681807550000 has 60 divisors (see below), whose sum is σ = 1651147101072. Its totient is φ = 272723000000.

The previous prime is 681807549979. The next prime is 681807550009. The reversal of 681807550000 is 55708186.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (681807550009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6768076 + ... + 6868075.

Almost surely, 2^681807550000 is an apocalyptic number.

It is an amenable number.

681807550000 is an abundant number, since it is smaller than the sum of its proper divisors (969339551072).

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

681807550000 is an equidigital number, since it uses as much as digits as its factorization.

681807550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13636184 (or 13636158 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 681807550000 in words is "six hundred eighty-one billion, eight hundred seven million, five hundred fifty thousand".