11872643165 has 8 divisors (see below), whose sum is σ = 14407252920. Its totient is φ = 9391393792.

The previous prime is 11872643137. The next prime is 11872643201. The reversal of 11872643165 is 56134627811.

It can be written as a sum of positive squares in 4 ways, for example, as 206267044 + 11666376121 = 14362^2 + 108011^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11872643165 - 2⁸ = 11872642909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13339604 + ... + 13340493.

It is an arithmetic number, because the mean of its divisors is an integer number (1800906615).

Almost surely, 2^11872643165 is an apocalyptic number.

It is an amenable number.

11872643165 is a deficient number, since it is larger than the sum of its proper divisors (2534609755).

11872643165 is an equidigital number, since it uses as much as digits as its factorization.

11872643165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26680191.

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

The spelling of 11872643165 in words is "eleven billion, eight hundred seventy-two million, six hundred forty-three thousand, one hundred sixty-five".