7957940817 has 4 divisors (see below), whose sum is σ = 10610587760. Its totient is φ = 5305293876.

The previous prime is 7957940801. The next prime is 7957940833. The reversal of 7957940817 is 7180497597.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (7957940801) and next prime (7957940833).

It is not a de Polignac number, because 7957940817 - 2⁴ = 7957940801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7957940857) 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, 1326323467 + ... + 1326323472.

It is an arithmetic number, because the mean of its divisors is an integer number (2652646940).

Almost surely, 2^7957940817 is an apocalyptic number.

It is an amenable number.

7957940817 is a deficient number, since it is larger than the sum of its proper divisors (2652646943).

7957940817 is a wasteful number, since it uses less digits than its factorization.

7957940817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652646942.

The product of its (nonzero) digits is 4445280, while the sum is 57.

The square root of 7957940817 is about 89207.2912771148. The cubic root of 7957940817 is about 1996.4889078061.

The spelling of 7957940817 in words is "seven billion, nine hundred fifty-seven million, nine hundred forty thousand, eight hundred seventeen".