7981745872 has 40 divisors (see below), whose sum is σ = 16288421760. Its totient is φ = 3778536960.

The previous prime is 7981745869. The next prime is 7981745881. The reversal of 7981745872 is 2785471897.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561768 + ... + 575800.

It is an arithmetic number, because the mean of its divisors is an integer number (407210544).

Almost surely, 2^7981745872 is an apocalyptic number.

It is an amenable number.

7981745872 is an abundant number, since it is smaller than the sum of its proper divisors (8306675888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7981745872 is a wasteful number, since it uses less digits than its factorization.

7981745872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15931 (or 15925 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 58.

The square root of 7981745872 is about 89340.6171458425. The cubic root of 7981745872 is about 1998.4776642075.

The spelling of 7981745872 in words is "seven billion, nine hundred eighty-one million, seven hundred forty-five thousand, eight hundred seventy-two".