7721433564 has 36 divisors (see below), whose sum is σ = 19509189336. Its totient is φ = 2375825088.

The previous prime is 7721433557. The next prime is 7721433607. The reversal of 7721433564 is 4653341277.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1901679 + ... + 1905734.

It is an arithmetic number, because the mean of its divisors is an integer number (541921926).

Almost surely, 2^7721433564 is an apocalyptic number.

It is an amenable number.

7721433564 is an abundant number, since it is smaller than the sum of its proper divisors (11787755772).

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

7721433564 is a wasteful number, since it uses less digits than its factorization.

7721433564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807446 (or 3807431 counting only the distinct ones).

The product of its digits is 423360, while the sum is 42.

The square root of 7721433564 is about 87871.6880684558. The cubic root of 7721433564 is about 1976.5113519631.

The spelling of 7721433564 in words is "seven billion, seven hundred twenty-one million, four hundred thirty-three thousand, five hundred sixty-four".