681370874340 has 48 divisors (see below), whose sum is σ = 2054595254208. Its totient is φ = 167722061184.

The previous prime is 681370874323. The next prime is 681370874417. The reversal of 681370874340 is 43478073186.

It is a happy number.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436775422 + ... + 436776981.

It is an arithmetic number, because the mean of its divisors is an integer number (42804067796).

Almost surely, 2^681370874340 is an apocalyptic number.

681370874340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

681370874340 is an abundant number, since it is smaller than the sum of its proper divisors (1373224379868).

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

681370874340 is a wasteful number, since it uses less digits than its factorization.

681370874340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873552428 (or 873552426 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 51.

The spelling of 681370874340 in words is "six hundred eighty-one billion, three hundred seventy million, eight hundred seventy-four thousand, three hundred forty".