551723616 has 96 divisors (see below), whose sum is σ = 1661184000. Its totient is φ = 177966720.

The previous prime is 551723603. The next prime is 551723617. The reversal of 551723616 is 616327155.

551723616 is a `hidden beast` number, since 5 + 5 + 17 + 23 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551723617) 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, 16485 + ... + 37083.

It is an arithmetic number, because the mean of its divisors is an integer number (17304000).

Almost surely, 2^551723616 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 551723616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830592000).

551723616 is an abundant number, since it is smaller than the sum of its proper divisors (1109460384).

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

551723616 is a wasteful number, since it uses less digits than its factorization.

551723616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20649 (or 20635 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 551723616 is about 23488.7976703790. The cubic root of 551723616 is about 820.1762540023.

The spelling of 551723616 in words is "five hundred fifty-one million, seven hundred twenty-three thousand, six hundred sixteen".