11816181357 has 8 divisors (see below), whose sum is σ = 15794594976. Its totient is φ = 7857610992.

The previous prime is 11816181331. The next prime is 11816181383. The reversal of 11816181357 is 75318161811.

It is an interprime number because it is at equal distance from previous prime (11816181331) and next prime (11816181383).

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

It is not a de Polignac number, because 11816181357 - 2²⁶ = 11749072493 is a prime.

It is a super-2 number, since 2×11816181357² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11816186357) 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, 4959423 + ... + 4961804.

It is an arithmetic number, because the mean of its divisors is an integer number (1974324372).

Almost surely, 2^11816181357 is an apocalyptic number.

It is an amenable number.

11816181357 is a deficient number, since it is larger than the sum of its proper divisors (3978413619).

11816181357 is an equidigital number, since it uses as much as digits as its factorization.

11816181357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9921627.

The product of its digits is 40320, while the sum is 42.

The spelling of 11816181357 in words is "eleven billion, eight hundred sixteen million, one hundred eighty-one thousand, three hundred fifty-seven".