551787632 has 80 divisors (see below), whose sum is σ = 1241920512. Its totient is φ = 234716160.

The previous prime is 551787541. The next prime is 551787737. The reversal of 551787632 is 236787155.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 666803 + ... + 667629.

Almost surely, 2^551787632 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 551787632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620960256).

551787632 is an abundant number, since it is smaller than the sum of its proper divisors (690132880).

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

551787632 is a wasteful number, since it uses less digits than its factorization.

551787632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086 (or 1080 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The square root of 551787632 is about 23490.1603229948. The cubic root of 551787632 is about 820.2079742157.

The spelling of 551787632 in words is "five hundred fifty-one million, seven hundred eighty-seven thousand, six hundred thirty-two".