15561044484 has 24 divisors (see below), whose sum is σ = 36642217920. Its totient is φ = 5139427104.

The previous prime is 15561044459. The next prime is 15561044501. The reversal of 15561044484 is 48444016551.

It is a super-2 number, since 2×15561044484² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5947104 + ... + 5949719.

It is an arithmetic number, because the mean of its divisors is an integer number (1526759080).

Almost surely, 2^15561044484 is an apocalyptic number.

It is an amenable number.

15561044484 is an abundant number, since it is smaller than the sum of its proper divisors (21081173436).

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

15561044484 is a wasteful number, since it uses less digits than its factorization.

15561044484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11896939 (or 11896937 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 42.

The spelling of 15561044484 in words is "fifteen billion, five hundred sixty-one million, forty-four thousand, four hundred eighty-four".