7721157116 has 12 divisors (see below), whose sum is σ = 13571550888. Its totient is φ = 3843571152.

The previous prime is 7721157089. The next prime is 7721157149. The reversal of 7721157116 is 6117511277.

It is a self number, because there is not a number n which added to its sum of digits gives 7721157116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4250831 + ... + 4252646.

It is an arithmetic number, because the mean of its divisors is an integer number (1130962574).

Almost surely, 2^7721157116 is an apocalyptic number.

It is an amenable number.

7721157116 is a deficient number, since it is larger than the sum of its proper divisors (5850393772).

7721157116 is a wasteful number, since it uses less digits than its factorization.

7721157116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8503708 (or 8503706 counting only the distinct ones).

The product of its digits is 20580, while the sum is 38.

The square root of 7721157116 is about 87870.1150334970. The cubic root of 7721157116 is about 1976.4877635484.

The spelling of 7721157116 in words is "seven billion, seven hundred twenty-one million, one hundred fifty-seven thousand, one hundred sixteen".