11847121642 has 16 divisors (see below), whose sum is σ = 18719157600. Its totient is φ = 5607841680.

The previous prime is 11847121639. The next prime is 11847121669. The reversal of 11847121642 is 24612174811.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54784 + ... + 163387.

It is an arithmetic number, because the mean of its divisors is an integer number (1169947350).

Almost surely, 2^11847121642 is an apocalyptic number.

11847121642 is a deficient number, since it is larger than the sum of its proper divisors (6872035958).

11847121642 is a wasteful number, since it uses less digits than its factorization.

11847121642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219621.

The product of its digits is 21504, while the sum is 37.

The spelling of 11847121642 in words is "eleven billion, eight hundred forty-seven million, one hundred twenty-one thousand, six hundred forty-two".