8121977732 has 48 divisors (see below), whose sum is σ = 16526643840. Its totient is φ = 3451584000.

The previous prime is 8121977693. The next prime is 8121977767. The reversal of 8121977732 is 2377791218.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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, 76994 + ... + 148902.

It is an arithmetic number, because the mean of its divisors is an integer number (344305080).

Almost surely, 2^8121977732 is an apocalyptic number.

It is an amenable number.

8121977732 is an abundant number, since it is smaller than the sum of its proper divisors (8404666108).

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

8121977732 is a wasteful number, since it uses less digits than its factorization.

8121977732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72092 (or 72090 counting only the distinct ones).

The product of its digits is 296352, while the sum is 47.

The square root of 8121977732 is about 90122.0158008020. The cubic root of 8121977732 is about 2010.1135825190.

The spelling of 8121977732 in words is "eight billion, one hundred twenty-one million, nine hundred seventy-seven thousand, seven hundred thirty-two".