7991275394 has 8 divisors (see below), whose sum is σ = 12103291200. Its totient is φ = 3956844996.

The previous prime is 7991275361. The next prime is 7991275399. The reversal of 7991275394 is 4935721997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (7991275399) 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, 19396094 + ... + 19396505.

It is an arithmetic number, because the mean of its divisors is an integer number (1512911400).

Almost surely, 2^7991275394 is an apocalyptic number.

7991275394 is a deficient number, since it is larger than the sum of its proper divisors (4112015806).

7991275394 is a wasteful number, since it uses less digits than its factorization.

7991275394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38792704.

The product of its digits is 4286520, while the sum is 56.

The square root of 7991275394 is about 89393.9337651051. The cubic root of 7991275394 is about 1999.2726850385.

The spelling of 7991275394 in words is "seven billion, nine hundred ninety-one million, two hundred seventy-five thousand, three hundred ninety-four".