531613399992 has 32 divisors (see below), whose sum is σ = 1330153228800. Its totient is φ = 177055169504.

The previous prime is 531613399991. The next prime is 531613400011. The reversal of 531613399992 is 299993316135.

It is a super-2 number, since 2×531613399992² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531613399991) 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, 9301992 + ... + 9358967.

It is an arithmetic number, because the mean of its divisors is an integer number (41567288400).

Almost surely, 2^531613399992 is an apocalyptic number.

It is an amenable number.

531613399992 is an abundant number, since it is smaller than the sum of its proper divisors (798539828808).

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

531613399992 is a wasteful number, since it uses less digits than its factorization.

531613399992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18662155 (or 18662151 counting only the distinct ones).

The product of its digits is 10628820, while the sum is 60.

The spelling of 531613399992 in words is "five hundred thirty-one billion, six hundred thirteen million, three hundred ninety-nine thousand, nine hundred ninety-two".