15631552864464 has 160 divisors (see below), whose sum is σ = 42797697676800. Its totient is φ = 4902547161600.

The previous prime is 15631552864409. The next prime is 15631552864511. The reversal of 15631552864464 is 46446825513651.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15631552864398 and 15631552864407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215663622 + ... + 215736090.

It is an arithmetic number, because the mean of its divisors is an integer number (267485610480).

Almost surely, 2^{15631552864464} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15631552864464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21398848838400).

15631552864464 is an abundant number, since it is smaller than the sum of its proper divisors (27166144812336).

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

15631552864464 is a wasteful number, since it uses less digits than its factorization.

15631552864464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74113 (or 74107 counting only the distinct ones).

The product of its digits is 82944000, while the sum is 60.

The spelling of 15631552864464 in words is "fifteen trillion, six hundred thirty-one billion, five hundred fifty-two million, eight hundred sixty-four thousand, four hundred sixty-four".