891064608312 has 32 divisors (see below), whose sum is σ = 2227725294480. Its totient is φ = 297013032960.

The previous prime is 891064608311. The next prime is 891064608419. The reversal of 891064608312 is 213806460198.

It is a super-2 number, since 2×891064608312² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891064608311) 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, 354498 + ... + 1381230.

Almost surely, 2^891064608312 is an apocalyptic number.

It is an amenable number.

891064608312 is an abundant number, since it is smaller than the sum of its proper divisors (1336660686168).

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

891064608312 is a wasteful number, since it uses less digits than its factorization.

891064608312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062903 (or 1062899 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 891064608312 in words is "eight hundred ninety-one billion, sixty-four million, six hundred eight thousand, three hundred twelve".