551136664 has 48 divisors (see below), whose sum is σ = 1137528000. Its totient is φ = 248854848.

The previous prime is 551136661. The next prime is 551136673. The reversal of 551136664 is 466631155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551136661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228537 + ... + 230935.

It is an arithmetic number, because the mean of its divisors is an integer number (23698500).

Almost surely, 2^551136664 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 551136664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568764000).

551136664 is an abundant number, since it is smaller than the sum of its proper divisors (586391336).

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

551136664 is a wasteful number, since it uses less digits than its factorization.

551136664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512 (or 2461 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 551136664 is about 23476.3000491986. The cubic root of 551136664 is about 819.8853022203.

The spelling of 551136664 in words is "five hundred fifty-one million, one hundred thirty-six thousand, six hundred sixty-four".