15556232540 has 24 divisors (see below), whose sum is σ = 32925322752. Its totient is φ = 6173496000.

The previous prime is 15556232477. The next prime is 15556232579. The reversal of 15556232540 is 4523265551.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 15556232494 and 15556232503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3059711 + ... + 3064790.

It is an arithmetic number, because the mean of its divisors is an integer number (1371888448).

Almost surely, 2^15556232540 is an apocalyptic number.

15556232540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15556232540 is an abundant number, since it is smaller than the sum of its proper divisors (17369090212).

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

15556232540 is a wasteful number, since it uses less digits than its factorization.

15556232540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6124637 (or 6124635 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 15556232540 in words is "fifteen billion, five hundred fifty-six million, two hundred thirty-two thousand, five hundred forty".