11781715013775 has 288 divisors, whose sum is σ = 26446789963776. Its totient is φ = 5085037440000.

The previous prime is 11781715013773. The next prime is 11781715013779. The reversal of 11781715013775 is 57731051718711.

11781715013775 is a `hidden beast` number, since 117 + 8 + 1 + 7 + 150 + 1 + 377 + 5 = 666.

It is not a de Polignac number, because 11781715013775 - 2¹ = 11781715013773 is a prime.

It is a super-2 number, since 2×11781715013775² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11781715013771) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 53940285 + ... + 54158265.

Almost surely, 2^{11781715013775} is an apocalyptic number.

11781715013775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11781715013775 is an abundant number, since it is smaller than the sum of its proper divisors (14665074950001).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11781715013775 is a wasteful number, since it uses less digits than its factorization.

11781715013775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218085 (or 218068 counting only the distinct ones).

The product of its (nonzero) digits is 1440600, while the sum is 54.

The spelling of 11781715013775 in words is "eleven trillion, seven hundred eighty-one billion, seven hundred fifteen million, thirteen thousand, seven hundred seventy-five".