11866287642 has 32 divisors (see below), whose sum is σ = 25928087040. Its totient is φ = 3590566320.

The previous prime is 11866287613. The next prime is 11866287661. The reversal of 11866287642 is 24678266811.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86542 + ... + 176697.

It is an arithmetic number, because the mean of its divisors is an integer number (810252720).

Almost surely, 2^11866287642 is an apocalyptic number.

11866287642 is an abundant number, since it is smaller than the sum of its proper divisors (14061799398).

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

11866287642 is a wasteful number, since it uses less digits than its factorization.

11866287642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263938.

The product of its digits is 1548288, while the sum is 51.

The spelling of 11866287642 in words is "eleven billion, eight hundred sixty-six million, two hundred eighty-seven thousand, six hundred forty-two".