11857372777 has 2 divisors, whose sum is σ = 11857372778. Its totient is φ = 11857372776.

The previous prime is 11857372763. The next prime is 11857372799. The reversal of 11857372777 is 77727375811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10475317801 + 1382054976 = 102349^2 + 37176^2 .

It is a cyclic number.

It is not a de Polignac number, because 11857372777 - 2⁷ = 11857372649 is a prime.

It is not a weakly prime, because it can be changed into another prime (11857382777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5928686388 + 5928686389.

It is an arithmetic number, because the mean of its divisors is an integer number (5928686389).

Almost surely, 2^11857372777 is an apocalyptic number.

It is an amenable number.

11857372777 is a deficient number, since it is larger than the sum of its proper divisors (1).

11857372777 is an equidigital number, since it uses as much as digits as its factorization.

11857372777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4033680, while the sum is 55.

The spelling of 11857372777 in words is "eleven billion, eight hundred fifty-seven million, three hundred seventy-two thousand, seven hundred seventy-seven".