372665221809 has 8 divisors (see below), whose sum is σ = 496890421632. Its totient is φ = 248441751600.

The previous prime is 372665221757. The next prime is 372665221823. The reversal of 372665221809 is 908122566273.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 372665221809 - 2⁸ = 372665221553 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (372665221879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204259 + ... + 887159.

It is an arithmetic number, because the mean of its divisors is an integer number (62111302704).

Almost surely, 2^372665221809 is an apocalyptic number.

It is an amenable number.

372665221809 is a deficient number, since it is larger than the sum of its proper divisors (124225199823).

372665221809 is a wasteful number, since it uses less digits than its factorization.

372665221809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864807.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 372665221809 in words is "three hundred seventy-two billion, six hundred sixty-five million, two hundred twenty-one thousand, eight hundred nine".