11427131778 has 32 divisors (see below), whose sum is σ = 23186580480. Its totient is φ = 3753706320.

The previous prime is 11427131773. The next prime is 11427131843. The reversal of 11427131778 is 87713172411.

It is not an unprimeable number, because it can be changed into a prime (11427131773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1247451 + ... + 1256577.

It is an arithmetic number, because the mean of its divisors is an integer number (724580640).

Almost surely, 2^11427131778 is an apocalyptic number.

11427131778 is an abundant number, since it is smaller than the sum of its proper divisors (11759448702).

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

11427131778 is a wasteful number, since it uses less digits than its factorization.

11427131778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12142.

The product of its digits is 65856, while the sum is 42.

The spelling of 11427131778 in words is "eleven billion, four hundred twenty-seven million, one hundred thirty-one thousand, seven hundred seventy-eight".