11381177857 has 8 divisors (see below), whose sum is σ = 13014042176. Its totient is φ = 9750058992.

The previous prime is 11381177831. The next prime is 11381177879. The reversal of 11381177857 is 75877118311.

It is a happy number.

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 11381177857 - 2¹⁹ = 11380653569 is a prime.

It is a super-2 number, since 2×11381177857² (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 11381177857.

It is not an unprimeable number, because it can be changed into a prime (11381177257) 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, 422358 + ... + 448495.

It is an arithmetic number, because the mean of its divisors is an integer number (1626755272).

Almost surely, 2^11381177857 is an apocalyptic number.

It is an amenable number.

11381177857 is a deficient number, since it is larger than the sum of its proper divisors (1632864319).

11381177857 is an equidigital number, since it uses as much as digits as its factorization.

11381177857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872727.

The product of its digits is 329280, while the sum is 49.

The spelling of 11381177857 in words is "eleven billion, three hundred eighty-one million, one hundred seventy-seven thousand, eight hundred fifty-seven".