551064465 has 48 divisors (see below), whose sum is σ = 1132080768. Its totient is φ = 251911296.

The previous prime is 551064461. The next prime is 551064487. The reversal of 551064465 is 564460155.

551064465 is a `hidden beast` number, since 5 + 5 + 1 + 0 + 644 + 6 + 5 = 666.

It is not a de Polignac number, because 551064465 - 2² = 551064461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551064461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23892 + ... + 40901.

It is an arithmetic number, because the mean of its divisors is an integer number (23585016).

Almost surely, 2^551064465 is an apocalyptic number.

It is an amenable number.

551064465 is an abundant number, since it is smaller than the sum of its proper divisors (581016303).

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

551064465 is an equidigital number, since it uses as much as digits as its factorization.

551064465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64820 (or 64808 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 551064465 is about 23474.7622991160. The cubic root of 551064465 is about 819.8494989505.

The spelling of 551064465 in words is "five hundred fifty-one million, sixty-four thousand, four hundred sixty-five".