11810981727 has 12 divisors (see below), whose sum is σ = 18063854640. Its totient is φ = 7410811968.

The previous prime is 11810981681. The next prime is 11810981737. The reversal of 11810981727 is 72718901811.

It is not a de Polignac number, because 11810981727 - 2⁷ = 11810981599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11810981737) 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, 38597827 + ... + 38598132.

It is an arithmetic number, because the mean of its divisors is an integer number (1505321220).

Almost surely, 2^11810981727 is an apocalyptic number.

11810981727 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11810981727 is a deficient number, since it is larger than the sum of its proper divisors (6252872913).

11810981727 is a wasteful number, since it uses less digits than its factorization.

11810981727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77195982 (or 77195979 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 45.

The spelling of 11810981727 in words is "eleven billion, eight hundred ten million, nine hundred eighty-one thousand, seven hundred twenty-seven".