73400680656 has 80 divisors (see below), whose sum is σ = 212859292800. Its totient is φ = 24214643712.

The previous prime is 73400680651. The next prime is 73400680669. The reversal of 73400680656 is 65608600437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73400680651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 833916 + ... + 917723.

It is an arithmetic number, because the mean of its divisors is an integer number (2660741160).

Almost surely, 2^73400680656 is an apocalyptic number.

It is an amenable number.

73400680656 is an abundant number, since it is smaller than the sum of its proper divisors (139458612144).

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

73400680656 is a wasteful number, since it uses less digits than its factorization.

73400680656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751753 (or 1751741 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 73400680656 in words is "seventy-three billion, four hundred million, six hundred eighty thousand, six hundred fifty-six".