10931861504 has 48 divisors (see below), whose sum is σ = 22184908200. Its totient is φ = 5384282112.

The previous prime is 10931861497. The next prime is 10931861513. The reversal of 10931861504 is 40516813901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97382 + ... + 177050.

Almost surely, 2^10931861504 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 10931861504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11092454100).

10931861504 is an abundant number, since it is smaller than the sum of its proper divisors (11253046696).

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

10931861504 is an frugal number, since it uses more digits than its factorization.

10931861504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79758 (or 79738 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 10931861504 in words is "ten billion, nine hundred thirty-one million, eight hundred sixty-one thousand, five hundred four".