1101553590 has 128 divisors (see below), whose sum is σ = 2892298752. Its totient is φ = 267438080.

The previous prime is 1101553589. The next prime is 1101553591. The reversal of 1101553590 is 953551011.

It is an interprime number because it is at equal distance from previous prime (1101553589) and next prime (1101553591).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101553591) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2243245 + ... + 2243735.

It is an arithmetic number, because the mean of its divisors is an integer number (22596084).

Almost surely, 2^1101553590 is an apocalyptic number.

1101553590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101553590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446149376).

1101553590 is an abundant number, since it is smaller than the sum of its proper divisors (1790745162).

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

1101553590 is a wasteful number, since it uses less digits than its factorization.

1101553590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654.

The product of its (nonzero) digits is 3375, while the sum is 30.

The square root of 1101553590 is about 33189.6608901025. The cubic root of 1101553590 is about 1032.7658686806.

The spelling of 1101553590 in words is "one billion, one hundred one million, five hundred fifty-three thousand, five hundred ninety".