12076857191 has 4 divisors (see below), whose sum is σ = 13802122512. Its totient is φ = 10351591872.

The previous prime is 12076857173. The next prime is 12076857193. The reversal of 12076857191 is 19175867021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19175867021 = 19 ⋅1009256159.

It is a cyclic number.

It is not a de Polignac number, because 12076857191 - 2¹⁴ = 12076840807 is a prime.

It is a super-2 number, since 2×12076857191² (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 (12076857193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862632650 + ... + 862632663.

It is an arithmetic number, because the mean of its divisors is an integer number (3450530628).

Almost surely, 2^12076857191 is an apocalyptic number.

12076857191 is a deficient number, since it is larger than the sum of its proper divisors (1725265321).

12076857191 is an equidigital number, since it uses as much as digits as its factorization.

12076857191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725265320.

The product of its (nonzero) digits is 211680, while the sum is 47.

The spelling of 12076857191 in words is "twelve billion, seventy-six million, eight hundred fifty-seven thousand, one hundred ninety-one".