85557072213 has 6 divisors (see below), whose sum is σ = 123582437654. Its totient is φ = 57038048136.

The previous prime is 85557072203. The next prime is 85557072241. The reversal of 85557072213 is 31227075558.

85557072213 is a `hidden beast` number, since 8 + 5 + 5 + 570 + 72 + 2 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 77421393009 + 8135679204 = 278247^2 + 90198^2 .

It is not a de Polignac number, because 85557072213 - 2⁶ = 85557072149 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 (85557072203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4753170670 + ... + 4753170687.

Almost surely, 2^85557072213 is an apocalyptic number.

It is an amenable number.

85557072213 is a deficient number, since it is larger than the sum of its proper divisors (38025365441).

85557072213 is a wasteful number, since it uses less digits than its factorization.

85557072213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9506341363 (or 9506341360 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The spelling of 85557072213 in words is "eighty-five billion, five hundred fifty-seven million, seventy-two thousand, two hundred thirteen".