1553117664 has 48 divisors (see below), whose sum is σ = 4659355008. Its totient is φ = 443747712.

The previous prime is 1553117651. The next prime is 1553117669. The reversal of 1553117664 is 4667113551.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553117669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154922 + ... + 1156265.

It is an arithmetic number, because the mean of its divisors is an integer number (97069896).

Almost surely, 2^1553117664 is an apocalyptic number.

1553117664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1553117664 is an abundant number, since it is smaller than the sum of its proper divisors (3106237344).

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

1553117664 is a wasteful number, since it uses less digits than its factorization.

1553117664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311207 (or 2311199 counting only the distinct ones).

The product of its digits is 75600, while the sum is 39.

The square root of 1553117664 is about 39409.6138524599. The cubic root of 1553117664 is about 1158.0699335228.

The spelling of 1553117664 in words is "one billion, five hundred fifty-three million, one hundred seventeen thousand, six hundred sixty-four".