551251520540 has 96 divisors (see below), whose sum is σ = 1325684828160. Its totient is φ = 188617976064.

The previous prime is 551251520531. The next prime is 551251520587. The reversal of 551251520540 is 45025152155.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 551251520540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270352841 + ... + 270354879.

It is an arithmetic number, because the mean of its divisors is an integer number (13809216960).

Almost surely, 2^551251520540 is an apocalyptic number.

It is an amenable number.

551251520540 is an abundant number, since it is smaller than the sum of its proper divisors (774433307620).

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

551251520540 is a wasteful number, since it uses less digits than its factorization.

551251520540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019 (or 5017 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 35.

Adding to 551251520540 its reverse (45025152155), we get a palindrome (596276672695).

The spelling of 551251520540 in words is "five hundred fifty-one billion, two hundred fifty-one million, five hundred twenty thousand, five hundred forty".