831642579012 has 24 divisors (see below), whose sum is σ = 2217713544256. Its totient is φ = 237612165408.

The previous prime is 831642578993. The next prime is 831642579013. The reversal of 831642579012 is 210975246138.

It is a super-2 number, since 2×831642579012² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (831642579013) 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, 4950253363 + ... + 4950253530.

It is a 1-persistent number, because it is pandigital, but 2⋅831642579012 = 1663285158024 is not.

Almost surely, 2^831642579012 is an apocalyptic number.

It is an amenable number.

831642579012 is an abundant number, since it is smaller than the sum of its proper divisors (1386070965244).

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

831642579012 is a wasteful number, since it uses less digits than its factorization.

831642579012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9900506907 (or 9900506905 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 831642579012 in words is "eight hundred thirty-one billion, six hundred forty-two million, five hundred seventy-nine thousand, twelve".