681257316 has 48 divisors (see below), whose sum is σ = 1618049664. Its totient is φ = 223047936.

The previous prime is 681257251. The next prime is 681257341. The reversal of 681257316 is 613752186.

It is a super-2 number, since 2×681257316² = 928223061207047712, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 228910 + ... + 231866.

It is an arithmetic number, because the mean of its divisors is an integer number (33709368).

Almost surely, 2^681257316 is an apocalyptic number.

It is an amenable number.

681257316 is an abundant number, since it is smaller than the sum of its proper divisors (936792348).

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

681257316 is a wasteful number, since it uses less digits than its factorization.

681257316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300 (or 3298 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 681257316 is about 26100.9064210422. The cubic root of 681257316 is about 879.9075815479.

The spelling of 681257316 in words is "six hundred eighty-one million, two hundred fifty-seven thousand, three hundred sixteen".