285198890877 has 24 divisors (see below), whose sum is σ = 432161533440. Its totient is φ = 180990704160.

The previous prime is 285198890849. The next prime is 285198890903. The reversal of 285198890877 is 778098891582.

285198890877 is a `hidden beast` number, since 28 + 519 + 8 + 8 + 9 + 0 + 87 + 7 = 666.

It is not a de Polignac number, because 285198890877 - 2⁶ = 285198890813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285198890777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7676653 + ... + 7713714.

It is an arithmetic number, because the mean of its divisors is an integer number (18006730560).

Almost surely, 2^285198890877 is an apocalyptic number.

It is an amenable number.

285198890877 is a deficient number, since it is larger than the sum of its proper divisors (146962642563).

285198890877 is a wasteful number, since it uses less digits than its factorization.

285198890877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15390473 (or 15390470 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 72.

The spelling of 285198890877 in words is "two hundred eighty-five billion, one hundred ninety-eight million, eight hundred ninety thousand, eight hundred seventy-seven".