681831574146 has 24 divisors (see below), whose sum is σ = 1505175363900. Its totient is φ = 222988942176.

The previous prime is 681831574091. The next prime is 681831574157. The reversal of 681831574146 is 641475138186.

681831574146 is a `hidden beast` number, since 68 + 1 + 8 + 3 + 1 + 574 + 1 + 4 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 675215541225 + 6616032921 = 821715^2 + 81339^2 .

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 681831574092 and 681831574101.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 357353121 + ... + 357355028.

Almost surely, 2^681831574146 is an apocalyptic number.

681831574146 is an abundant number, since it is smaller than the sum of its proper divisors (823343789754).

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

681831574146 is a wasteful number, since it uses less digits than its factorization.

681831574146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714708210 (or 714708207 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The spelling of 681831574146 in words is "six hundred eighty-one billion, eight hundred thirty-one million, five hundred seventy-four thousand, one hundred forty-six".