681027264 has 70 divisors (see below), whose sum is σ = 2018793524. Its totient is φ = 227007360.

The previous prime is 681027257. The next prime is 681027307. The reversal of 681027264 is 462720186.

It is a super-2 number, since 2×681027264² = 927596268622651392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 60502 + ... + 70869.

Almost surely, 2^681027264 is an apocalyptic number.

681027264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

681027264 is an abundant number, since it is smaller than the sum of its proper divisors (1337766260).

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

681027264 is a wasteful number, since it uses less digits than its factorization.

681027264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131395 (or 131376 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 681027264 is about 26096.4990755465. The cubic root of 681027264 is about 879.8085258344.

The spelling of 681027264 in words is "six hundred eighty-one million, twenty-seven thousand, two hundred sixty-four".