73618515645 has 32 divisors (see below), whose sum is σ = 122581105920. Its totient is φ = 37682265600.

The previous prime is 73618515643. The next prime is 73618515683. The reversal of 73618515645 is 54651581637.

It is not a de Polignac number, because 73618515645 - 2¹ = 73618515643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73618515643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 434056 + ... + 579345.

It is an arithmetic number, because the mean of its divisors is an integer number (3830659560).

Almost surely, 2^73618515645 is an apocalyptic number.

It is an amenable number.

73618515645 is a deficient number, since it is larger than the sum of its proper divisors (48962590275).

73618515645 is a wasteful number, since it uses less digits than its factorization.

73618515645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013605.

The product of its digits is 3024000, while the sum is 51.

The spelling of 73618515645 in words is "seventy-three billion, six hundred eighteen million, five hundred fifteen thousand, six hundred forty-five".