11236560731 has 18 divisors (see below), whose sum is σ = 12678540588. Its totient is φ = 9875949000.

The previous prime is 11236560721. The next prime is 11236560773. The reversal of 11236560731 is 13706563211.

It is not a de Polignac number, because 11236560731 - 2¹⁸ = 11236298587 is a prime.

It is a super-2 number, since 2×11236560731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11236560691 and 11236560700.

It is not an unprimeable number, because it can be changed into a prime (11236560721) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10898186 + ... + 10899216.

It is an arithmetic number, because the mean of its divisors is an integer number (704363366).

Almost surely, 2^11236560731 is an apocalyptic number.

11236560731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11236560731 is a deficient number, since it is larger than the sum of its proper divisors (1441979857).

11236560731 is an frugal number, since it uses more digits than its factorization.

11236560731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 11236560731 in words is "eleven billion, two hundred thirty-six million, five hundred sixty thousand, seven hundred thirty-one".