85178876500 has 24 divisors (see below), whose sum is σ = 186030667368. Its totient is φ = 34071550400.

The previous prime is 85178876491. The next prime is 85178876501. The reversal of 85178876500 is 567887158.

It can be written as a sum of positive squares in 4 ways, for example, as 1469342224 + 83709534276 = 38332^2 + 289326^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85178876501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85178377 + ... + 85179376.

It is an arithmetic number, because the mean of its divisors is an integer number (7751277807).

Almost surely, 2^85178876500 is an apocalyptic number.

It is an amenable number.

85178876500 is an abundant number, since it is smaller than the sum of its proper divisors (100851790868).

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

85178876500 is a wasteful number, since it uses less digits than its factorization.

85178876500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170357772 (or 170357760 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 55.

The spelling of 85178876500 in words is "eighty-five billion, one hundred seventy-eight million, eight hundred seventy-six thousand, five hundred".