73506663613 has 12 divisors (see below), whose sum is σ = 78116420160. Its totient is φ = 69154845632.

The previous prime is 73506663583. The next prime is 73506663617. The reversal of 73506663613 is 31636660537.

It is not a de Polignac number, because 73506663613 - 2³³ = 64916729021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73506663617) 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, 684918 + ... + 784936.

It is an arithmetic number, because the mean of its divisors is an integer number (6509701680).

Almost surely, 2^73506663613 is an apocalyptic number.

It is an amenable number.

73506663613 is a deficient number, since it is larger than the sum of its proper divisors (4609756547).

73506663613 is a wasteful number, since it uses less digits than its factorization.

73506663613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102596 (or 102579 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 46.

The spelling of 73506663613 in words is "seventy-three billion, five hundred six million, six hundred sixty-three thousand, six hundred thirteen".