372121198506 has 12 divisors (see below), whose sum is σ = 806262596802. Its totient is φ = 124040399496.

The previous prime is 372121198481. The next prime is 372121198507. The reversal of 372121198506 is 605891121273.

372121198506 is a `hidden beast` number, since 3 + 7 + 2 + 121 + 19 + 8 + 506 = 666.

It can be written as a sum of positive squares in only one way, i.e., 361062783225 + 11058415281 = 600885^2 + 105159^2 .

It is not an unprimeable number, because it can be changed into a prime (372121198507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10336699941 + ... + 10336699976.

Almost surely, 2^372121198506 is an apocalyptic number.

372121198506 is an abundant number, since it is smaller than the sum of its proper divisors (434141398296).

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

372121198506 is a wasteful number, since it uses less digits than its factorization.

372121198506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20673399925 (or 20673399922 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 372121198506 in words is "three hundred seventy-two billion, one hundred twenty-one million, one hundred ninety-eight thousand, five hundred six".