15609534072 has 64 divisors (see below), whose sum is σ = 42969398400. Its totient is φ = 4685946240.

The previous prime is 15609534071. The next prime is 15609534077. The reversal of 15609534072 is 27043590651.

15609534072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15609534071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248047 + ... + 304542.

It is an arithmetic number, because the mean of its divisors is an integer number (671396850).

Almost surely, 2^15609534072 is an apocalyptic number.

15609534072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15609534072 is an abundant number, since it is smaller than the sum of its proper divisors (27359864328).

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

15609534072 is a wasteful number, since it uses less digits than its factorization.

15609534072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552716 (or 552712 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 15609534072 in words is "fifteen billion, six hundred nine million, five hundred thirty-four thousand, seventy-two".