73689233957 has 4 divisors (see below), whose sum is σ = 78023894796. Its totient is φ = 69354573120.

The previous prime is 73689233941. The next prime is 73689233977. The reversal of 73689233957 is 75933298637.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20874759361 + 52814474596 = 144481^2 + 229814^2 .

It is a cyclic number.

It is not a de Polignac number, because 73689233957 - 2⁴ = 73689233941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73689233957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73689233977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2167330394 + ... + 2167330427.

It is an arithmetic number, because the mean of its divisors is an integer number (19505973699).

Almost surely, 2^73689233957 is an apocalyptic number.

It is an amenable number.

73689233957 is a deficient number, since it is larger than the sum of its proper divisors (4334660839).

73689233957 is a wasteful number, since it uses less digits than its factorization.

73689233957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4334660838.

The product of its digits is 51438240, while the sum is 62.

The spelling of 73689233957 in words is "seventy-three billion, six hundred eighty-nine million, two hundred thirty-three thousand, nine hundred fifty-seven".