551878974 has 32 divisors (see below), whose sum is σ = 1279722240. Its totient is φ = 175961016.

The previous prime is 551878949. The next prime is 551878991. The reversal of 551878974 is 479878155.

551878974 is a `hidden beast` number, since 551 + 8 + 7 + 89 + 7 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 551878974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220932 + ... + 223415.

It is an arithmetic number, because the mean of its divisors is an integer number (39991320).

Almost surely, 2^551878974 is an apocalyptic number.

551878974 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

551878974 is an abundant number, since it is smaller than the sum of its proper divisors (727843266).

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

551878974 is a wasteful number, since it uses less digits than its factorization.

551878974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444381 (or 444375 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The square root of 551878974 is about 23492.1045034284. The cubic root of 551878974 is about 820.2532303365.

The spelling of 551878974 in words is "five hundred fifty-one million, eight hundred seventy-eight thousand, nine hundred seventy-four".