681109493628 has 96 divisors (see below), whose sum is σ = 1671364710400. Its totient is φ = 215612305920.

The previous prime is 681109493599. The next prime is 681109493657. The reversal of 681109493628 is 826394901186.

It is an interprime number because it is at equal distance from previous prime (681109493599) and next prime (681109493657).

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5341026 + ... + 5467062.

Almost surely, 2^681109493628 is an apocalyptic number.

It is an amenable number.

681109493628 is an abundant number, since it is smaller than the sum of its proper divisors (990255216772).

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

681109493628 is a wasteful number, since it uses less digits than its factorization.

681109493628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126347 (or 126345 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 57.

The spelling of 681109493628 in words is "six hundred eighty-one billion, one hundred nine million, four hundred ninety-three thousand, six hundred twenty-eight".