8197451972 has 12 divisors (see below), whose sum is σ = 14733258540. Its totient is φ = 3987949536.

The previous prime is 8197451963. The next prime is 8197451989. The reversal of 8197451972 is 2791547918.

It can be written as a sum of positive squares in 2 ways, for example, as 2922916096 + 5274535876 = 54064^2 + 72626^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27693947 + ... + 27694242.

It is an arithmetic number, because the mean of its divisors is an integer number (1227771545).

Almost surely, 2^8197451972 is an apocalyptic number.

It is an amenable number.

8197451972 is a deficient number, since it is larger than the sum of its proper divisors (6535806568).

8197451972 is a wasteful number, since it uses less digits than its factorization.

8197451972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55388230 (or 55388228 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 53.

The square root of 8197451972 is about 90539.7811572350. The cubic root of 8197451972 is about 2016.3207847152.

The spelling of 8197451972 in words is "eight billion, one hundred ninety-seven million, four hundred fifty-one thousand, nine hundred seventy-two".