15531678912 has 56 divisors (see below), whose sum is σ = 41166745200. Its totient is φ = 5168091136.

The previous prime is 15531678829. The next prime is 15531678919. The reversal of 15531678912 is 21987613551.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

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 (15531678919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38164 + ... + 180332.

It is an arithmetic number, because the mean of its divisors is an integer number (735120450).

Almost surely, 2^15531678912 is an apocalyptic number.

15531678912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15531678912 is an abundant number, since it is smaller than the sum of its proper divisors (25635066288).

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

15531678912 is a wasteful number, since it uses less digits than its factorization.

15531678912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142753 (or 142743 counting only the distinct ones).

The product of its digits is 453600, while the sum is 48.

The spelling of 15531678912 in words is "fifteen billion, five hundred thirty-one million, six hundred seventy-eight thousand, nine hundred twelve".