1553691552 has 96 divisors (see below), whose sum is σ = 4706537472. Its totient is φ = 439582464.

The previous prime is 1553691551. The next prime is 1553691553. The reversal of 1553691552 is 2551963551.

1553691552 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1553691551) and next prime (1553691553).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1553691551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57993 + ... + 80439.

It is an arithmetic number, because the mean of its divisors is an integer number (49026432).

Almost surely, 2^1553691552 is an apocalyptic number.

1553691552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1553691552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2353268736).

1553691552 is an abundant number, since it is smaller than the sum of its proper divisors (3152845920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1553691552 is a wasteful number, since it uses less digits than its factorization.

1553691552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22570 (or 22562 counting only the distinct ones).

The product of its digits is 202500, while the sum is 42.

The square root of 1553691552 is about 39416.8942459956. The cubic root of 1553691552 is about 1158.2125543110.

The spelling of 1553691552 in words is "one billion, five hundred fifty-three million, six hundred ninety-one thousand, five hundred fifty-two".