73686051406640 has 80 divisors (see below), whose sum is σ = 176185184736000. Its totient is φ = 28644300470016.

The previous prime is 73686051406577. The next prime is 73686051406679. The reversal of 73686051406640 is 4660415068637.

It is a tau number, because it is divible by the number of its divisors (80).

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, 53135450 + ... + 54504569.

It is an arithmetic number, because the mean of its divisors is an integer number (2202314809200).

Almost surely, 2^{73686051406640} is an apocalyptic number.

It is an amenable number.

73686051406640 is an abundant number, since it is smaller than the sum of its proper divisors (102499133329360).

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

73686051406640 is a wasteful number, since it uses less digits than its factorization.

73686051406640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107640274 (or 107640268 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 73686051406640 in words is "seventy-three trillion, six hundred eighty-six billion, fifty-one million, four hundred six thousand, six hundred forty".