11727775731 has 8 divisors (see below), whose sum is σ = 17870896384. Its totient is φ = 6701586120.

The previous prime is 11727775723. The next prime is 11727775733. The reversal of 11727775731 is 13757772711.

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

It is not a de Polignac number, because 11727775731 - 2³ = 11727775723 is a prime.

It is a super-2 number, since 2×11727775731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11727775733) 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, 279232735 + ... + 279232776.

It is an arithmetic number, because the mean of its divisors is an integer number (2233862048).

Almost surely, 2^11727775731 is an apocalyptic number.

11727775731 is a deficient number, since it is larger than the sum of its proper divisors (6143120653).

11727775731 is an equidigital number, since it uses as much as digits as its factorization.

11727775731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558465521.

The product of its digits is 504210, while the sum is 48.

The spelling of 11727775731 in words is "eleven billion, seven hundred twenty-seven million, seven hundred seventy-five thousand, seven hundred thirty-one".