85782871657 has 4 divisors (see below), whose sum is σ = 98037567616. Its totient is φ = 73528175700.

The previous prime is 85782871637. The next prime is 85782871661. The reversal of 85782871657 is 75617828758.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 85782871657 - 2⁷ = 85782871529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85782871627) 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, 6127347969 + ... + 6127347982.

It is an arithmetic number, because the mean of its divisors is an integer number (24509391904).

Almost surely, 2^85782871657 is an apocalyptic number.

It is an amenable number.

85782871657 is a deficient number, since it is larger than the sum of its proper divisors (12254695959).

85782871657 is a wasteful number, since it uses less digits than its factorization.

85782871657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12254695958.

The product of its digits is 52684800, while the sum is 64.

The spelling of 85782871657 in words is "eighty-five billion, seven hundred eighty-two million, eight hundred seventy-one thousand, six hundred fifty-seven".