15688961040 has 40 divisors (see below), whose sum is σ = 48635779968. Its totient is φ = 4183722880.

The previous prime is 15688961039. The next prime is 15688961047. The reversal of 15688961040 is 4016988651.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×15688961040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (15688961047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32685096 + ... + 32685575.

Almost surely, 2^15688961040 is an apocalyptic number.

15688961040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15688961040 is an abundant number, since it is smaller than the sum of its proper divisors (32946818928).

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

15688961040 is a wasteful number, since it uses less digits than its factorization.

15688961040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65370687 (or 65370681 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 15688961040 in words is "fifteen billion, six hundred eighty-eight million, nine hundred sixty-one thousand, forty".