73718645 has 72 divisors (see below), whose sum is σ = 121500288. Its totient is φ = 42007680.

The previous prime is 73718639. The next prime is 73718663. The reversal of 73718645 is 54681737.

It is not a de Polignac number, because 73718645 - 2⁴ = 73718629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 715664 + ... + 715766.

It is an arithmetic number, because the mean of its divisors is an integer number (1687504).

Almost surely, 2^73718645 is an apocalyptic number.

It is an amenable number.

73718645 is a deficient number, since it is larger than the sum of its proper divisors (47781643).

73718645 is a wasteful number, since it uses less digits than its factorization.

73718645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 139 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 73718645 is about 8585.9562659031. The cubic root of 73718645 is about 419.3008871990.

The spelling of 73718645 in words is "seventy-three million, seven hundred eighteen thousand, six hundred forty-five".