7651516217 has 4 divisors (see below), whose sum is σ = 7652823156. Its totient is φ = 7650209280.

The previous prime is 7651516211. The next prime is 7651516219. The reversal of 7651516217 is 7126151567.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5662713001 + 1988803216 = 75251^2 + 44596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7651516217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7651516211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644648 + ... + 656409.

It is an arithmetic number, because the mean of its divisors is an integer number (1913205789).

Almost surely, 2^7651516217 is an apocalyptic number.

It is an amenable number.

7651516217 is a deficient number, since it is larger than the sum of its proper divisors (1306939).

7651516217 is a wasteful number, since it uses less digits than its factorization.

7651516217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306938.

The product of its digits is 88200, while the sum is 41.

The square root of 7651516217 is about 87472.9456289200. The cubic root of 7651516217 is about 1970.5275041299.

The spelling of 7651516217 in words is "seven billion, six hundred fifty-one million, five hundred sixteen thousand, two hundred seventeen".