681775372 has 12 divisors (see below), whose sum is σ = 1208210080. Its totient is φ = 336572496.

The previous prime is 681775337. The next prime is 681775417. The reversal of 681775372 is 273577186.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

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, 1078443 + ... + 1079074.

Almost surely, 2^681775372 is an apocalyptic number.

It is an amenable number.

681775372 is a deficient number, since it is larger than the sum of its proper divisors (526434708).

681775372 is a wasteful number, since it uses less digits than its factorization.

681775372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157600 (or 2157598 counting only the distinct ones).

The product of its digits is 493920, while the sum is 46.

The square root of 681775372 is about 26110.8286348787. The cubic root of 681775372 is about 880.1305643051.

The spelling of 681775372 in words is "six hundred eighty-one million, seven hundred seventy-five thousand, three hundred seventy-two".