73457289557 has 2 divisors, whose sum is σ = 73457289558. Its totient is φ = 73457289556.

The previous prime is 73457289553. The next prime is 73457289673. The reversal of 73457289557 is 75598275437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62887599076 + 10569690481 = 250774^2 + 102809^2 .

It is a cyclic number.

It is not a de Polignac number, because 73457289557 - 2² = 73457289553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73457289557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73457289553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36728644778 + 36728644779.

It is an arithmetic number, because the mean of its divisors is an integer number (36728644779).

Almost surely, 2^73457289557 is an apocalyptic number.

It is an amenable number.

73457289557 is a deficient number, since it is larger than the sum of its proper divisors (1).

73457289557 is an equidigital number, since it uses as much as digits as its factorization.

73457289557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088000, while the sum is 62.

The spelling of 73457289557 in words is "seventy-three billion, four hundred fifty-seven million, two hundred eighty-nine thousand, five hundred fifty-seven".