861334756412 has 24 divisors (see below), whose sum is σ = 1629144994176. Its totient is φ = 396103952448.

The previous prime is 861334756397. The next prime is 861334756423. The reversal of 861334756412 is 214657433168.

It is a super-2 number, since 2×861334756412² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 29884748 + ... + 29913555.

It is an arithmetic number, because the mean of its divisors is an integer number (67881041424).

Almost surely, 2^861334756412 is an apocalyptic number.

It is an amenable number.

861334756412 is a deficient number, since it is larger than the sum of its proper divisors (767810237764).

861334756412 is a wasteful number, since it uses less digits than its factorization.

861334756412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59798597 (or 59798595 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 50.

The spelling of 861334756412 in words is "eight hundred sixty-one billion, three hundred thirty-four million, seven hundred fifty-six thousand, four hundred twelve".