531660520536 has 64 divisors (see below), whose sum is σ = 1370444296320. Its totient is φ = 171777365760.

The previous prime is 531660520519. The next prime is 531660520541. The reversal of 531660520536 is 635025066135.

It is a super-2 number, since 2×531660520536² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1831125 + ... + 2101508.

It is an arithmetic number, because the mean of its divisors is an integer number (21413192130).

Almost surely, 2^531660520536 is an apocalyptic number.

It is an amenable number.

531660520536 is an abundant number, since it is smaller than the sum of its proper divisors (838783775784).

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

531660520536 is a wasteful number, since it uses less digits than its factorization.

531660520536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3932816 (or 3932812 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 42.

The spelling of 531660520536 in words is "five hundred thirty-one billion, six hundred sixty million, five hundred twenty thousand, five hundred thirty-six".