551179520640 has 896 divisors, whose sum is σ = 2290582437120. Its totient is φ = 124157214720.

The previous prime is 551179520629. The next prime is 551179520713. The reversal of 551179520640 is 46025971155.

It is a happy number.

551179520640 is a `hidden beast` number, since 5 + 5 + 11 + 79 + 520 + 6 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (896).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 231879132 + ... + 231881508.

Almost surely, 2^551179520640 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 551179520640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1145291218560).

551179520640 is an abundant number, since it is smaller than the sum of its proper divisors (1739402916480).

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

551179520640 is an equidigital number, since it uses as much as digits as its factorization.

551179520640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492 (or 2465 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 551179520640 in words is "five hundred fifty-one billion, one hundred seventy-nine million, five hundred twenty thousand, six hundred forty".