73128583377 has 10 divisors (see below), whose sum is σ = 109241464178. Its totient is φ = 48752388864.

The previous prime is 73128583357. The next prime is 73128583379. The reversal of 73128583377 is 77338582137.

73128583377 is a `hidden beast` number, since 7 + 3 + 1 + 28 + 583 + 37 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49914709056 + 23213874321 = 223416^2 + 152361^2 .

It is not a de Polignac number, because 73128583377 - 2²⁰ = 73127534801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73128583379) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 451410928 + ... + 451411089.

Almost surely, 2^73128583377 is an apocalyptic number.

It is an amenable number.

73128583377 is a deficient number, since it is larger than the sum of its proper divisors (36112880801).

73128583377 is an equidigital number, since it uses as much as digits as its factorization.

73128583377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902822029 (or 902822020 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 54.

The spelling of 73128583377 in words is "seventy-three billion, one hundred twenty-eight million, five hundred eighty-three thousand, three hundred seventy-seven".