11778771784131 has 12 divisors (see below), whose sum is σ = 18560488872120. Its totient is φ = 7138649566080.

The previous prime is 11778771784069. The next prime is 11778771784151. The reversal of 11778771784131 is 13148717787711.

11778771784131 is a `hidden beast` number, since 1 + 1 + 7 + 7 + 87 + 71 + 78 + 413 + 1 = 666.

It is not a de Polignac number, because 11778771784131 - 2⁹ = 11778771783619 is a prime.

It is a super-2 number, since 2×11778771784131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11778771784151) 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, 59488746286 + ... + 59488746483.

It is an arithmetic number, because the mean of its divisors is an integer number (1546707406010).

Almost surely, 2^{11778771784131} is an apocalyptic number.

11778771784131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11778771784131 is a deficient number, since it is larger than the sum of its proper divisors (6781717087989).

11778771784131 is a wasteful number, since it uses less digits than its factorization.

11778771784131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118977492786 (or 118977492783 counting only the distinct ones).

The product of its digits is 12907776, while the sum is 63.

The spelling of 11778771784131 in words is "eleven trillion, seven hundred seventy-eight billion, seven hundred seventy-one million, seven hundred eighty-four thousand, one hundred thirty-one".