681399083100 has 72 divisors (see below), whose sum is σ = 1979186167728. Its totient is φ = 180999372800.

The previous prime is 681399083083. The next prime is 681399083111. The reversal of 681399083100 is 1380993186.

It is a super-2 number, since 2×681399083100² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 681399083100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4341831 + ... + 4496030.

It is an arithmetic number, because the mean of its divisors is an integer number (27488696774).

Almost surely, 2^681399083100 is an apocalyptic number.

681399083100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

681399083100 is an abundant number, since it is smaller than the sum of its proper divisors (1297787084628).

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

681399083100 is a wasteful number, since it uses less digits than its factorization.

681399083100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8838135 (or 8838128 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The spelling of 681399083100 in words is "six hundred eighty-one billion, three hundred ninety-nine million, eighty-three thousand, one hundred".