85457221362 has 18 divisors (see below), whose sum is σ = 185160000207. Its totient is φ = 28485327036.

The previous prime is 85457221351. The next prime is 85457221387. The reversal of 85457221362 is 26312275458.

85457221362 is a `hidden beast` number, since 8 + 5 + 4 + 572 + 2 + 13 + 62 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42728610681 + 42728610681 = 206709^2 + 206709^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=206709.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1205803 + ... + 1274705.

Almost surely, 2^85457221362 is an apocalyptic number.

85457221362 is an abundant number, since it is smaller than the sum of its proper divisors (99702778845).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85457221362 is an frugal number, since it uses more digits than its factorization.

85457221362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137814 (or 68908 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The spelling of 85457221362 in words is "eighty-five billion, four hundred fifty-seven million, two hundred twenty-one thousand, three hundred sixty-two".