15609509064 has 48 divisors (see below), whose sum is σ = 42283959120. Its totient is φ = 5202159840.

The previous prime is 15609508997. The next prime is 15609509093. The reversal of 15609509064 is 46090590651.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 414759 + ... + 450825.

It is an arithmetic number, because the mean of its divisors is an integer number (880915815).

Almost surely, 2^15609509064 is an apocalyptic number.

It is an amenable number.

15609509064 is an abundant number, since it is smaller than the sum of its proper divisors (26674450056).

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

15609509064 is a wasteful number, since it uses less digits than its factorization.

15609509064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42090 (or 42083 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 15609509064 in words is "fifteen billion, six hundred nine million, five hundred nine thousand, sixty-four".