7165116021 has 48 divisors (see below), whose sum is σ = 11671069184. Its totient is φ = 3829337856.

The previous prime is 7165115957. The next prime is 7165116031. The reversal of 7165116021 is 1206115617.

It is not a de Polignac number, because 7165116021 - 2⁶ = 7165115957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7165116021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7165116031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 985626 + ... + 992868.

Almost surely, 2^7165116021 is an apocalyptic number.

It is an amenable number.

7165116021 is a deficient number, since it is larger than the sum of its proper divisors (4505953163).

7165116021 is a wasteful number, since it uses less digits than its factorization.

7165116021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450 (or 7433 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 7165116021 is about 84647.0083405196. The cubic root of 7165116021 is about 1927.8551903550.

The spelling of 7165116021 in words is "seven billion, one hundred sixty-five million, one hundred sixteen thousand, twenty-one".