681625300 has 18 divisors (see below), whose sum is σ = 1479127118. Its totient is φ = 272650080.

The previous prime is 681625297. The next prime is 681625327. The reversal of 681625300 is 3526186.

It can be written as a sum of positive squares in 3 ways, for example, as 9156676 + 672468624 = 3026^2 + 25932^2 .

It is a super-2 number, since 2×681625300² = 929226099200180000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3408027 + ... + 3408226.

Almost surely, 2^681625300 is an apocalyptic number.

It is an amenable number.

681625300 is an abundant number, since it is smaller than the sum of its proper divisors (797501818).

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

681625300 is a wasteful number, since it uses less digits than its factorization.

681625300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6816267 (or 6816260 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 681625300 is about 26107.9547264814. The cubic root of 681625300 is about 880.0659816229.

The spelling of 681625300 in words is "six hundred eighty-one million, six hundred twenty-five thousand, three hundred".