11727872605 has 4 divisors (see below), whose sum is σ = 14073447132. Its totient is φ = 9382298080.

The previous prime is 11727872543. The next prime is 11727872621. The reversal of 11727872605 is 50627872711.

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 2442237561 + 9285635044 = 49419^2 + 96362^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11727872605 is a prime.

It is a super-3 number, since 3×11727872605³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172787256 + ... + 1172787265.

It is an arithmetic number, because the mean of its divisors is an integer number (3518361783).

Almost surely, 2^11727872605 is an apocalyptic number.

It is an amenable number.

11727872605 is a deficient number, since it is larger than the sum of its proper divisors (2345574527).

11727872605 is an equidigital number, since it uses as much as digits as its factorization.

11727872605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345574526.

The product of its (nonzero) digits is 329280, while the sum is 46.

The spelling of 11727872605 in words is "eleven billion, seven hundred twenty-seven million, eight hundred seventy-two thousand, six hundred five".