551772890 has 8 divisors (see below), whose sum is σ = 993191220. Its totient is φ = 220709152.

The previous prime is 551772887. The next prime is 551772913. The reversal of 551772890 is 98277155.

It can be written as a sum of positive squares in 2 ways, for example, as 548449561 + 3323329 = 23419^2 + 1823^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27588635 + ... + 27588654.

Almost surely, 2^551772890 is an apocalyptic number.

551772890 is a deficient number, since it is larger than the sum of its proper divisors (441418330).

551772890 is a wasteful number, since it uses less digits than its factorization.

551772890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55177296.

The product of its (nonzero) digits is 176400, while the sum is 44.

The square root of 551772890 is about 23489.8465299371. The cubic root of 551772890 is about 820.2006697064.

The spelling of 551772890 in words is "five hundred fifty-one million, seven hundred seventy-two thousand, eight hundred ninety".