85500778 has 16 divisors (see below), whose sum is σ = 141071040. Its totient is φ = 38862780.

The previous prime is 85500763. The next prime is 85500781. The reversal of 85500778 is 87700558.

It is a self number, because there is not a number n which added to its sum of digits gives 85500778.

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, 13398 + ... + 18721.

It is an arithmetic number, because the mean of its divisors is an integer number (8816940).

Almost surely, 2^85500778 is an apocalyptic number.

85500778 is a deficient number, since it is larger than the sum of its proper divisors (55570262).

85500778 is a wasteful number, since it uses less digits than its factorization.

85500778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32154 (or 32132 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 40.

The square root of 85500778 is about 9246.6630737796. The cubic root of 85500778 is about 440.5447419706.

The spelling of 85500778 in words is "eighty-five million, five hundred thousand, seven hundred seventy-eight".