722861611164 has 288 divisors, whose sum is σ = 2456505192960. Its totient is φ = 173535436800.

The previous prime is 722861611081. The next prime is 722861611181. The reversal of 722861611164 is 461116168227.

722861611164 is a `hidden beast` number, since 7 + 2 + 2 + 8 + 616 + 11 + 16 + 4 = 666.

It is a super-2 number, since 2×722861611164² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1992012 + ... + 2326764.

It is an arithmetic number, because the mean of its divisors is an integer number (8529531920).

Almost surely, 2^722861611164 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 722861611164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1228252596480).

722861611164 is an abundant number, since it is smaller than the sum of its proper divisors (1733643581796).

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

722861611164 is a wasteful number, since it uses less digits than its factorization.

722861611164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334841 (or 334836 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

It can be divided in two parts, 722861 and 611164, that added together give a square (1334025 = 1155²).

The spelling of 722861611164 in words is "seven hundred twenty-two billion, eight hundred sixty-one million, six hundred eleven thousand, one hundred sixty-four".