83715572657 has 4 divisors (see below), whose sum is σ = 85087959156. Its totient is φ = 82343186160.

The previous prime is 83715572641. The next prime is 83715572711. The reversal of 83715572657 is 75627551738.

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 18792023056 + 64923549601 = 137084^2 + 254801^2 .

It is a cyclic number.

It is not a de Polignac number, because 83715572657 - 2⁴ = 83715572641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83715572627) 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, 686193158 + ... + 686193279.

It is an arithmetic number, because the mean of its divisors is an integer number (21271989789).

Almost surely, 2^83715572657 is an apocalyptic number.

It is an amenable number.

83715572657 is a deficient number, since it is larger than the sum of its proper divisors (1372386499).

83715572657 is a wasteful number, since it uses less digits than its factorization.

83715572657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372386498.

The product of its digits is 12348000, while the sum is 56.

The spelling of 83715572657 in words is "eighty-three billion, seven hundred fifteen million, five hundred seventy-two thousand, six hundred fifty-seven".