551956992491520 has 4480 divisors, whose sum is σ = 2577222732902400. Its totient is φ = 110992608460800.

The previous prime is 551956992491507. The next prime is 551956992491537. The reversal of 551956992491520 is 25194299659155.

551956992491520 is a `hidden beast` number, since 5 + 5 + 1 + 9 + 5 + 6 + 9 + 9 + 2 + 4 + 91 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (4480).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 17805064273905 + ... + 17805064273935.

Almost surely, 2^{551956992491520} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551956992491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288611366451200).

551956992491520 is an abundant number, since it is smaller than the sum of its proper divisors (2025265740410880).

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

551956992491520 is an frugal number, since it uses more digits than its factorization.

551956992491520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 393660000, while the sum is 72.

It can be divided in two parts, 5519569 and 92491520, that added together give a palindrome (98011089).

The spelling of 551956992491520 in words is "five hundred fifty-one trillion, nine hundred fifty-six billion, nine hundred ninety-two million, four hundred ninety-one thousand, five hundred twenty".