7951969018 has 48 divisors (see below), whose sum is σ = 14016391200. Its totient is φ = 3373532064.

The previous prime is 7951969013. The next prime is 7951969031. The reversal of 7951969018 is 8109691597.

It is a super-2 number, since 2×7951969018² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7951969018.

It is not an unprimeable number, because it can be changed into a prime (7951969013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4679533 + ... + 4681231.

It is an arithmetic number, because the mean of its divisors is an integer number (292008150).

Almost surely, 2^7951969018 is an apocalyptic number.

7951969018 is a deficient number, since it is larger than the sum of its proper divisors (6064422182).

7951969018 is a wasteful number, since it uses less digits than its factorization.

7951969018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171 (or 2164 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 55.

The square root of 7951969018 is about 89173.8135216836. The cubic root of 7951969018 is about 1995.9893810102.

The spelling of 7951969018 in words is "seven billion, nine hundred fifty-one million, nine hundred sixty-nine thousand, eighteen".