38172411665 has 4 divisors (see below), whose sum is σ = 45806894004. Its totient is φ = 30537929328.

The previous prime is 38172411661. The next prime is 38172411703. The reversal of 38172411665 is 56611427183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25455564304 + 12716847361 = 159548^2 + 112769^2 .

It is a cyclic number.

It is not a de Polignac number, because 38172411665 - 2² = 38172411661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38172411661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3817241162 + ... + 3817241171.

It is an arithmetic number, because the mean of its divisors is an integer number (11451723501).

Almost surely, 2^38172411665 is an apocalyptic number.

It is an amenable number.

38172411665 is a deficient number, since it is larger than the sum of its proper divisors (7634482339).

38172411665 is an equidigital number, since it uses as much as digits as its factorization.

38172411665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7634482338.

The product of its digits is 241920, while the sum is 44.

The spelling of 38172411665 in words is "thirty-eight billion, one hundred seventy-two million, four hundred eleven thousand, six hundred sixty-five".