551920578272 has 96 divisors (see below), whose sum is σ = 1315507898880. Its totient is φ = 222660472320.

The previous prime is 551920578271. The next prime is 551920578277. The reversal of 551920578272 is 272875029155.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551920578271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255197 + ... + 1081187.

It is an arithmetic number, because the mean of its divisors is an integer number (13703207280).

Almost surely, 2^551920578272 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 551920578272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657753949440).

551920578272 is an abundant number, since it is smaller than the sum of its proper divisors (763587320608).

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

551920578272 is a wasteful number, since it uses less digits than its factorization.

551920578272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826184 (or 826176 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 53.

The spelling of 551920578272 in words is "five hundred fifty-one billion, nine hundred twenty million, five hundred seventy-eight thousand, two hundred seventy-two".