551538960 has 160 divisors (see below), whose sum is σ = 1963802880. Its totient is φ = 125435904.

The previous prime is 551538931. The next prime is 551538961. The reversal of 551538960 is 69835155.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (551538961) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 390736 + ... + 392144.

It is an arithmetic number, because the mean of its divisors is an integer number (12273768).

Almost surely, 2^551538960 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 551538960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (981901440).

551538960 is an abundant number, since it is smaller than the sum of its proper divisors (1412263920).

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

551538960 is a wasteful number, since it uses less digits than its factorization.

551538960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665 (or 1659 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The square root of 551538960 is about 23484.8666166108. The cubic root of 551538960 is about 820.0847423822.

The spelling of 551538960 in words is "five hundred fifty-one million, five hundred thirty-eight thousand, nine hundred sixty".