551964720 has 80 divisors (see below), whose sum is σ = 1714577760. Its totient is φ = 146890752.

The previous prime is 551964719. The next prime is 551964731. The reversal of 551964720 is 27469155.

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

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, 131616 + ... + 135744.

It is an arithmetic number, because the mean of its divisors is an integer number (21432222).

Almost surely, 2^551964720 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 551964720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857288880).

551964720 is an abundant number, since it is smaller than the sum of its proper divisors (1162613040).

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

551964720 is a wasteful number, since it uses less digits than its factorization.

551964720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4702 (or 4696 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 551964720 is about 23493.9294286843. The cubic root of 551964720 is about 820.2957093307.

The spelling of 551964720 in words is "five hundred fifty-one million, nine hundred sixty-four thousand, seven hundred twenty".