7718223252 has 192 divisors, whose sum is σ = 19977560064. Its totient is φ = 2312217600.

The previous prime is 7718223239. The next prime is 7718223281. The reversal of 7718223252 is 2523228177.

It is a self number, because there is not a number n which added to its sum of digits gives 7718223252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56337328 + ... + 56337464.

It is an arithmetic number, because the mean of its divisors is an integer number (104049792).

Almost surely, 2^7718223252 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 7718223252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9988780032).

7718223252 is an abundant number, since it is smaller than the sum of its proper divisors (12259336812).

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

7718223252 is a wasteful number, since it uses less digits than its factorization.

7718223252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 356 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 7718223252 is about 87853.4191252680. The cubic root of 7718223252 is about 1976.2373917096.

The spelling of 7718223252 in words is "seven billion, seven hundred eighteen million, two hundred twenty-three thousand, two hundred fifty-two".