11953646361 has 10 divisors (see below), whose sum is σ = 17856681722. Its totient is φ = 7969097520.

The previous prime is 11953646333. The next prime is 11953646363. The reversal of 11953646361 is 16364635911.

11953646361 is a `hidden beast` number, since 1 + 1 + 9 + 5 + 3 + 6 + 4 + 636 + 1 = 666.

11953646361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11664000000 + 289646361 = 108000^2 + 17019^2 .

It is not a de Polignac number, because 11953646361 - 2¹⁰ = 11953645337 is a prime.

It is a super-2 number, since 2×11953646361² (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 (11953646363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 73787860 + ... + 73788021.

Almost surely, 2^11953646361 is an apocalyptic number.

It is an amenable number.

11953646361 is a deficient number, since it is larger than the sum of its proper divisors (5903035361).

11953646361 is an equidigital number, since it uses as much as digits as its factorization.

11953646361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147575893 (or 147575884 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The spelling of 11953646361 in words is "eleven billion, nine hundred fifty-three million, six hundred forty-six thousand, three hundred sixty-one".