7971841812 has 48 divisors (see below), whose sum is σ = 20299349952. Its totient is φ = 2414830080.

The previous prime is 7971841769. The next prime is 7971841861. The reversal of 7971841812 is 2181481797.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415258 + ... + 434030.

It is an arithmetic number, because the mean of its divisors is an integer number (422903124).

Almost surely, 2^7971841812 is an apocalyptic number.

It is an amenable number.

7971841812 is an abundant number, since it is smaller than the sum of its proper divisors (12327508140).

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

7971841812 is a wasteful number, since it uses less digits than its factorization.

7971841812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22008 (or 22006 counting only the distinct ones).

The product of its digits is 225792, while the sum is 48.

The square root of 7971841812 is about 89285.1712884060. The cubic root of 7971841812 is about 1997.6507258694.

The spelling of 7971841812 in words is "seven billion, nine hundred seventy-one million, eight hundred forty-one thousand, eight hundred twelve".