73917989845 has 24 divisors (see below), whose sum is σ = 104147848224. Its totient is φ = 50212897056.

The previous prime is 73917989807. The next prime is 73917989909. The reversal of 73917989845 is 54898971937.

It is not a de Polignac number, because 73917989845 - 2⁹ = 73917989333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1383627 + ... + 1436056.

It is an arithmetic number, because the mean of its divisors is an integer number (4339493676).

Almost surely, 2^73917989845 is an apocalyptic number.

It is an amenable number.

73917989845 is a deficient number, since it is larger than the sum of its proper divisors (30229858379).

73917989845 is a wasteful number, since it uses less digits than its factorization.

73917989845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819809 (or 2819802 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 70.

The spelling of 73917989845 in words is "seventy-three billion, nine hundred seventeen million, nine hundred eighty-nine thousand, eight hundred forty-five".