11857249882 has 4 divisors (see below), whose sum is σ = 17785874826. Its totient is φ = 5928624940.

The previous prime is 11857249841. The next prime is 11857249907. The reversal of 11857249882 is 28894275811.

It is a Cunningham number, because it is equal to 108891²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28894275811 = 17 ⋅1699663283.

It can be written as a sum of positive squares in only one way, i.e., 11857249881 + 1 = 108891^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2964312469 + ... + 2964312472.

Almost surely, 2^11857249882 is an apocalyptic number.

11857249882 is a deficient number, since it is larger than the sum of its proper divisors (5928624944).

11857249882 is an equidigital number, since it uses as much as digits as its factorization.

11857249882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5928624943.

The product of its digits is 2580480, while the sum is 55.

The spelling of 11857249882 in words is "eleven billion, eight hundred fifty-seven million, two hundred forty-nine thousand, eight hundred eighty-two".