551244804864 has 144 divisors (see below), whose sum is σ = 1672910017632. Its totient is φ = 159636455424.

The previous prime is 551244804839. The next prime is 551244804919. The reversal of 551244804864 is 468408442155.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 1454179 + ... + 1793634.

It is an arithmetic number, because the mean of its divisors is an integer number (11617430678).

Almost surely, 2^551244804864 is an apocalyptic number.

It is an amenable number.

551244804864 is an abundant number, since it is smaller than the sum of its proper divisors (1121665212768).

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

551244804864 is a wasteful number, since it uses less digits than its factorization.

551244804864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247862 (or 3247848 counting only the distinct ones).

The product of its (nonzero) digits is 4915200, while the sum is 51.

The spelling of 551244804864 in words is "five hundred fifty-one billion, two hundred forty-four million, eight hundred four thousand, eight hundred sixty-four".