7722864618 has 192 divisors, whose sum is σ = 19657634688. Its totient is φ = 2008903680.

The previous prime is 7722864607. The next prime is 7722864619. The reversal of 7722864618 is 8164682277.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (7722864619) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22255921 + ... + 22256267.

It is an arithmetic number, because the mean of its divisors is an integer number (102383514).

Almost surely, 2^7722864618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7722864618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9828817344).

7722864618 is an abundant number, since it is smaller than the sum of its proper divisors (11934770070).

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

7722864618 is a wasteful number, since it uses less digits than its factorization.

7722864618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 510 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 51.

The square root of 7722864618 is about 87879.8305528635. The cubic root of 7722864618 is about 1976.6334501776.

The spelling of 7722864618 in words is "seven billion, seven hundred twenty-two million, eight hundred sixty-four thousand, six hundred eighteen".