11861867253 has 4 divisors (see below), whose sum is σ = 15815823008. Its totient is φ = 7907911500.

The previous prime is 11861867243. The next prime is 11861867273. The reversal of 11861867253 is 35276816811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11861867253 - 2²⁸ = 11593431797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11861867233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1976977873 + ... + 1976977878.

It is an arithmetic number, because the mean of its divisors is an integer number (3953955752).

Almost surely, 2^11861867253 is an apocalyptic number.

It is an amenable number.

11861867253 is a deficient number, since it is larger than the sum of its proper divisors (3953955755).

11861867253 is an equidigital number, since it uses as much as digits as its factorization.

11861867253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3953955754.

The product of its digits is 483840, while the sum is 48.

The spelling of 11861867253 in words is "eleven billion, eight hundred sixty-one million, eight hundred sixty-seven thousand, two hundred fifty-three".