7981108964 has 6 divisors (see below), whose sum is σ = 13966940694. Its totient is φ = 3990554480.

The previous prime is 7981108957. The next prime is 7981108969. The reversal of 7981108964 is 4698011897.

It can be written as a sum of positive squares in only one way, i.e., 7964134564 + 16974400 = 89242^2 + 4120^2 .

It is not an unprimeable number, because it can be changed into a prime (7981108969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997638617 + ... + 997638624.

It is an arithmetic number, because the mean of its divisors is an integer number (2327823449).

Almost surely, 2^7981108964 is an apocalyptic number.

It is an amenable number.

7981108964 is a deficient number, since it is larger than the sum of its proper divisors (5985831730).

7981108964 is a wasteful number, since it uses less digits than its factorization.

7981108964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995277245 (or 1995277243 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 53.

The square root of 7981108964 is about 89337.0525817815. The cubic root of 7981108964 is about 1998.4245062356.

The spelling of 7981108964 in words is "seven billion, nine hundred eighty-one million, one hundred eight thousand, nine hundred sixty-four".