7971813122 has 64 divisors (see below), whose sum is σ = 15219283968. Its totient is φ = 3046464000.

The previous prime is 7971813097. The next prime is 7971813137. The reversal of 7971813122 is 2213181797.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 7971813122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4631222 + ... + 4632942.

It is an arithmetic number, because the mean of its divisors is an integer number (237801312).

Almost surely, 2^7971813122 is an apocalyptic number.

7971813122 is a deficient number, since it is larger than the sum of its proper divisors (7247470846).

7971813122 is a wasteful number, since it uses less digits than its factorization.

7971813122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595.

The product of its digits is 42336, while the sum is 41.

The square root of 7971813122 is about 89285.0106232844. The cubic root of 7971813122 is about 1997.6483294065.

The spelling of 7971813122 in words is "seven billion, nine hundred seventy-one million, eight hundred thirteen thousand, one hundred twenty-two".