11856020877 has 12 divisors (see below), whose sum is σ = 17139733884. Its totient is φ = 7897381440.

The previous prime is 11856020867. The next prime is 11856020941. The reversal of 11856020877 is 77802065811.

It is a happy number.

11856020877 is a `hidden beast` number, since 1 + 1 + 8 + 560 + 2 + 0 + 87 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3971646441 + 7884374436 = 63021^2 + 88794^2 .

It is not a de Polignac number, because 11856020877 - 2⁸ = 11856020621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11856020807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 541374 + ... + 562847.

It is an arithmetic number, because the mean of its divisors is an integer number (1428311157).

Almost surely, 2^11856020877 is an apocalyptic number.

It is an amenable number.

11856020877 is a deficient number, since it is larger than the sum of its proper divisors (5283713007).

11856020877 is a wasteful number, since it uses less digits than its factorization.

11856020877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105420 (or 1105417 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 45.

The spelling of 11856020877 in words is "eleven billion, eight hundred fifty-six million, twenty thousand, eight hundred seventy-seven".