551251411520 has 28 divisors (see below), whose sum is σ = 1312667424444. Its totient is φ = 220500564480.

The previous prime is 551251411511. The next prime is 551251411541. The reversal of 551251411520 is 25114152155.

It can be written as a sum of positive squares in 2 ways, for example, as 146989425664 + 404261985856 = 383392^2 + 635816^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 861330011 + ... + 861330650.

Almost surely, 2^551251411520 is an apocalyptic number.

It is an amenable number.

551251411520 is an abundant number, since it is smaller than the sum of its proper divisors (761416012924).

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

551251411520 is a wasteful number, since it uses less digits than its factorization.

551251411520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722660678 (or 1722660668 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 32.

Adding to 551251411520 its reverse (25114152155), we get a palindrome (576365563675).

The spelling of 551251411520 in words is "five hundred fifty-one billion, two hundred fifty-one million, four hundred eleven thousand, five hundred twenty".