85722352477 has 4 divisors (see below), whose sum is σ = 85723122240. Its totient is φ = 85721582716.

The previous prime is 85722352409. The next prime is 85722352571. The reversal of 85722352477 is 77425322758.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85722352477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85722352577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182293 + ... + 452410.

It is an arithmetic number, because the mean of its divisors is an integer number (21430780560).

Almost surely, 2^85722352477 is an apocalyptic number.

It is an amenable number.

85722352477 is a deficient number, since it is larger than the sum of its proper divisors (769763).

85722352477 is a wasteful number, since it uses less digits than its factorization.

85722352477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769762.

The product of its digits is 6585600, while the sum is 52.

The spelling of 85722352477 in words is "eighty-five billion, seven hundred twenty-two million, three hundred fifty-two thousand, four hundred seventy-seven".