11854881381 has 16 divisors (see below), whose sum is σ = 18083293184. Its totient is φ = 6767200944.

The previous prime is 11854881373. The next prime is 11854881383. The reversal of 11854881381 is 18318845811.

It is a happy number.

It is not a de Polignac number, because 11854881381 - 2³ = 11854881373 is a prime.

It is a super-2 number, since 2×11854881381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11854881381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11854881383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271585 + ... + 312198.

It is an arithmetic number, because the mean of its divisors is an integer number (1130205824).

Almost surely, 2^11854881381 is an apocalyptic number.

It is an amenable number.

11854881381 is a deficient number, since it is larger than the sum of its proper divisors (6228411803).

11854881381 is an equidigital number, since it uses as much as digits as its factorization.

11854881381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584760.

The product of its digits is 245760, while the sum is 48.

The spelling of 11854881381 in words is "eleven billion, eight hundred fifty-four million, eight hundred eighty-one thousand, three hundred eighty-one".