681300393984 has 408 divisors, whose sum is σ = 2322351629312. Its totient is φ = 188342599680.

The previous prime is 681300393973. The next prime is 681300394001. The reversal of 681300393984 is 489393003186.

It is a self number, because there is not a number n which added to its sum of digits gives 681300393984.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127989147 + ... + 127994469.

Almost surely, 2^681300393984 is an apocalyptic number.

681300393984 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681300393984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161175814656).

681300393984 is an abundant number, since it is smaller than the sum of its proper divisors (1641051235328).

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

681300393984 is an equidigital number, since it uses as much as digits as its factorization.

681300393984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5399 (or 5366 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 681300393984 in words is "six hundred eighty-one billion, three hundred million, three hundred ninety-three thousand, nine hundred eighty-four".