551630806000 has 80 divisors (see below), whose sum is σ = 1334155680000. Its totient is φ = 220600646400.

The previous prime is 551630805949. The next prime is 551630806033. The reversal of 551630806000 is 608036155.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×551630806000² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 9164001 + ... + 9223999.

It is an arithmetic number, because the mean of its divisors is an integer number (16676946000).

Almost surely, 2^551630806000 is an apocalyptic number.

551630806000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551630806000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667077840000).

551630806000 is an abundant number, since it is smaller than the sum of its proper divisors (782524874000).

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

551630806000 is a wasteful number, since it uses less digits than its factorization.

551630806000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64619 (or 64603 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 551630806000 in words is "five hundred fifty-one billion, six hundred thirty million, eight hundred six thousand".