7791477216 has 24 divisors (see below), whose sum is σ = 20452627944. Its totient is φ = 2597159040.

The previous prime is 7791477203. The next prime is 7791477251. The reversal of 7791477216 is 6127741977.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×7791477216² (a number of 21 digits) contains 22 as substring.

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, 40580515 + ... + 40580706.

It is an arithmetic number, because the mean of its divisors is an integer number (852192831).

Almost surely, 2^7791477216 is an apocalyptic number.

It is an amenable number.

7791477216 is an abundant number, since it is smaller than the sum of its proper divisors (12661150728).

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

7791477216 is a wasteful number, since it uses less digits than its factorization.

7791477216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81161234 (or 81161226 counting only the distinct ones).

The product of its digits is 1037232, while the sum is 51.

The square root of 7791477216 is about 88269.3447126464. The cubic root of 7791477216 is about 1982.4698980188.

The spelling of 7791477216 in words is "seven billion, seven hundred ninety-one million, four hundred seventy-seven thousand, two hundred sixteen".