551856977 has 8 divisors (see below), whose sum is σ = 630835776. Its totient is φ = 472913712.

The previous prime is 551856967. The next prime is 551856989. The reversal of 551856977 is 779658155.

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

It is a cyclic number.

It is not a de Polignac number, because 551856977 - 2¹² = 551852881 is a prime.

It is a super-2 number, since 2×551856977² = 609092246127157058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551856967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56723 + ... + 65735.

It is an arithmetic number, because the mean of its divisors is an integer number (78854472).

Almost surely, 2^551856977 is an apocalyptic number.

It is an amenable number.

551856977 is a deficient number, since it is larger than the sum of its proper divisors (78978799).

551856977 is an equidigital number, since it uses as much as digits as its factorization.

551856977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17767.

The product of its digits is 2646000, while the sum is 53.

The square root of 551856977 is about 23491.6363201885. The cubic root of 551856977 is about 820.2423322043.

The spelling of 551856977 in words is "five hundred fifty-one million, eight hundred fifty-six thousand, nine hundred seventy-seven".