11856857077 has 32 divisors (see below), whose sum is σ = 13762586880. Its totient is φ = 10117309440.

The previous prime is 11856857059. The next prime is 11856857093. The reversal of 11856857077 is 77075865811.

It is a cyclic number.

It is not a de Polignac number, because 11856857077 - 2²⁷ = 11722639349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11856855077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4596174 + ... + 4598752.

It is an arithmetic number, because the mean of its divisors is an integer number (430080840).

Almost surely, 2^11856857077 is an apocalyptic number.

11856857077 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11856857077 is a deficient number, since it is larger than the sum of its proper divisors (1905729803).

11856857077 is a wasteful number, since it uses less digits than its factorization.

11856857077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2973.

The product of its (nonzero) digits is 3292800, while the sum is 55.

The spelling of 11856857077 in words is "eleven billion, eight hundred fifty-six million, eight hundred fifty-seven thousand, seventy-seven".