11855117423 has 8 divisors (see below), whose sum is σ = 12183475488. Its totient is φ = 11527177824.

The previous prime is 11855117419. The next prime is 11855117509. The reversal of 11855117423 is 32471155811.

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

It is a cyclic number.

It is not a de Polignac number, because 11855117423 - 2² = 11855117419 is a prime.

It is a super-2 number, since 2×11855117423² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11855113423) 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, 46736 + ... + 160917.

It is an arithmetic number, because the mean of its divisors is an integer number (1522934436).

Almost surely, 2^11855117423 is an apocalyptic number.

11855117423 is a deficient number, since it is larger than the sum of its proper divisors (328358065).

11855117423 is a wasteful number, since it uses less digits than its factorization.

11855117423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209233.

The product of its digits is 33600, while the sum is 38.

The spelling of 11855117423 in words is "eleven billion, eight hundred fifty-five million, one hundred seventeen thousand, four hundred twenty-three".