42372910665 has 12 divisors (see below), whose sum is σ = 73446378564. Its totient is φ = 22598885664.

The previous prime is 42372910589. The next prime is 42372910681. The reversal of 42372910665 is 56601927324.

It can be written as a sum of positive squares in 2 ways, for example, as 15820859961 + 26552050704 = 125781^2 + 162948^2 .

It is not a de Polignac number, because 42372910665 - 2⁸ = 42372910409 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 941620237 = 42372910665 / (4 + 2 + 3 + 7 + 2 + 9 + 1 + 0 + 6 + 6 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42372910665.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 470810074 + ... + 470810163.

It is an arithmetic number, because the mean of its divisors is an integer number (6120531547).

Almost surely, 2^42372910665 is an apocalyptic number.

42372910665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42372910665 is a deficient number, since it is larger than the sum of its proper divisors (31073467899).

42372910665 is a wasteful number, since it uses less digits than its factorization.

42372910665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941620248 (or 941620245 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 42372910665 in words is "forty-two billion, three hundred seventy-two million, nine hundred ten thousand, six hundred sixty-five".