7997651139 has 32 divisors (see below), whose sum is σ = 11417889600. Its totient is φ = 4961964032.

The previous prime is 7997651119. The next prime is 7997651153. The reversal of 7997651139 is 9311567997.

It is a cyclic number.

It is not a de Polignac number, because 7997651139 - 2¹¹ = 7997649091 is a prime.

It is a super-2 number, since 2×7997651139² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7997651119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1768309 + ... + 1772825.

It is an arithmetic number, because the mean of its divisors is an integer number (356809050).

Almost surely, 2^7997651139 is an apocalyptic number.

7997651139 is a deficient number, since it is larger than the sum of its proper divisors (3420238461).

7997651139 is a wasteful number, since it uses less digits than its factorization.

7997651139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4919.

The product of its digits is 3214890, while the sum is 57.

The square root of 7997651139 is about 89429.5876038797. The cubic root of 7997651139 is about 1999.8042424234.

The spelling of 7997651139 in words is "seven billion, nine hundred ninety-seven million, six hundred fifty-one thousand, one hundred thirty-nine".