878561950518 has 48 divisors (see below), whose sum is σ = 2192616591360. Its totient is φ = 249041178288.

The previous prime is 878561950493. The next prime is 878561950523. The reversal of 878561950518 is 815059165878.

878561950518 is a `hidden beast` number, since 8 + 7 + 8 + 5 + 61 + 9 + 50 + 518 = 666.

It is a super-2 number, since 2×878561950518² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27435628 + ... + 27467631.

It is an arithmetic number, because the mean of its divisors is an integer number (45679512320).

Almost surely, 2^878561950518 is an apocalyptic number.

878561950518 is an abundant number, since it is smaller than the sum of its proper divisors (1314054640842).

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

878561950518 is a wasteful number, since it uses less digits than its factorization.

878561950518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54903401 (or 54903398 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 63.

The spelling of 878561950518 in words is "eight hundred seventy-eight billion, five hundred sixty-one million, nine hundred fifty thousand, five hundred eighteen".