85177255500 has 144 divisors (see below), whose sum is σ = 269507993664. Its totient is φ = 22646131200.

The previous prime is 85177255433. The next prime is 85177255567. The reversal of 85177255500 is 555277158.

85177255500 is a `hidden beast` number, since 8 + 5 + 1 + 77 + 25 + 550 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (85177255433) and next prime (85177255567).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1488417 + ... + 1544583.

Almost surely, 2^85177255500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85177255500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134753996832).

85177255500 is an abundant number, since it is smaller than the sum of its proper divisors (184330738164).

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

85177255500 is a wasteful number, since it uses less digits than its factorization.

85177255500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56529 (or 56514 counting only the distinct ones).

The product of its (nonzero) digits is 490000, while the sum is 45.

The spelling of 85177255500 in words is "eighty-five billion, one hundred seventy-seven million, two hundred fifty-five thousand, five hundred".