861930715212 has 36 divisors (see below), whose sum is σ = 2490022066896. Its totient is φ = 246265918560.

The previous prime is 861930715193. The next prime is 861930715271. The reversal of 861930715212 is 212517039168.

861930715212 is a `hidden beast` number, since 8 + 619 + 3 + 0 + 7 + 1 + 5 + 21 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1710179739 + ... + 1710180242.

It is an arithmetic number, because the mean of its divisors is an integer number (69167279636).

Almost surely, 2^861930715212 is an apocalyptic number.

It is an amenable number.

861930715212 is an abundant number, since it is smaller than the sum of its proper divisors (1628091351684).

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

861930715212 is a wasteful number, since it uses less digits than its factorization.

861930715212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420359998 (or 3420359993 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 861930715212 in words is "eight hundred sixty-one billion, nine hundred thirty million, seven hundred fifteen thousand, two hundred twelve".