11857897747 has 2 divisors, whose sum is σ = 11857897748. Its totient is φ = 11857897746.

The previous prime is 11857897729. The next prime is 11857897789. The reversal of 11857897747 is 74779875811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11857897747 - 2⁷ = 11857897619 is a prime.

It is not a weakly prime, because it can be changed into another prime (11857897147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5928948873 + 5928948874.

It is an arithmetic number, because the mean of its divisors is an integer number (5928948874).

Almost surely, 2^11857897747 is an apocalyptic number.

11857897747 is a deficient number, since it is larger than the sum of its proper divisors (1).

11857897747 is an equidigital number, since it uses as much as digits as its factorization.

11857897747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27659520, while the sum is 64.

The spelling of 11857897747 in words is "eleven billion, eight hundred fifty-seven million, eight hundred ninety-seven thousand, seven hundred forty-seven".