15609308940 has 36 divisors (see below), whose sum is σ = 47348237664. Its totient is φ = 4162482336.

The previous prime is 15609308933. The next prime is 15609308947. The reversal of 15609308940 is 4980390651.

It is a happy number.

15609308940 is a `hidden beast` number, since 1 + 5 + 609 + 30 + 8 + 9 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (15609308933) and next prime (15609308947).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (15609308947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43359012 + ... + 43359371.

It is an arithmetic number, because the mean of its divisors is an integer number (1315228824).

Almost surely, 2^15609308940 is an apocalyptic number.

15609308940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15609308940 is an abundant number, since it is smaller than the sum of its proper divisors (31738928724).

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

15609308940 is a wasteful number, since it uses less digits than its factorization.

15609308940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86718398 (or 86718393 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 15609308940 in words is "fifteen billion, six hundred nine million, three hundred eight thousand, nine hundred forty".