15695899840 has 56 divisors (see below), whose sum is σ = 37388243232. Its totient is φ = 6276280320.

The previous prime is 15695899801. The next prime is 15695899853. The reversal of 15695899840 is 4899859651.

It is a super-2 number, since 2×15695899840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

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, 1276120 + ... + 1288360.

Almost surely, 2^15695899840 is an apocalyptic number.

15695899840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15695899840 is an abundant number, since it is smaller than the sum of its proper divisors (21692343392).

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

15695899840 is a wasteful number, since it uses less digits than its factorization.

15695899840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16265 (or 16255 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 64.

The spelling of 15695899840 in words is "fifteen billion, six hundred ninety-five million, eight hundred ninety-nine thousand, eight hundred forty".