85457177658 has 16 divisors (see below), whose sum is σ = 189904839360. Its totient is φ = 28485725868.

The previous prime is 85457177639. The next prime is 85457177713. The reversal of 85457177658 is 85677175458.

85457177658 is a `hidden beast` number, since 8 + 5 + 4 + 571 + 7 + 7 + 6 + 58 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 85457177595 and 85457177604.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791270110 + ... + 791270217.

It is an arithmetic number, because the mean of its divisors is an integer number (11869052460).

Almost surely, 2^85457177658 is an apocalyptic number.

85457177658 is an abundant number, since it is smaller than the sum of its proper divisors (104447661702).

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

85457177658 is a wasteful number, since it uses less digits than its factorization.

85457177658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582540338 (or 1582540332 counting only the distinct ones).

The product of its digits is 65856000, while the sum is 63.

The spelling of 85457177658 in words is "eighty-five billion, four hundred fifty-seven million, one hundred seventy-seven thousand, six hundred fifty-eight".