551168778 has 16 divisors (see below), whose sum is σ = 1137897216. Its totient is φ = 177796320.

The previous prime is 551168773. The next prime is 551168791. The reversal of 551168778 is 877861155.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (551168771) 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, 1481451 + ... + 1481822.

It is an arithmetic number, because the mean of its divisors is an integer number (71118576).

Almost surely, 2^551168778 is an apocalyptic number.

551168778 is an abundant number, since it is smaller than the sum of its proper divisors (586728438).

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

551168778 is a wasteful number, since it uses less digits than its factorization.

551168778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963309.

The product of its digits is 470400, while the sum is 48.

The square root of 551168778 is about 23476.9840056171. The cubic root of 551168778 is about 819.9012264528.

The spelling of 551168778 in words is "five hundred fifty-one million, one hundred sixty-eight thousand, seven hundred seventy-eight".