11996999858 has 16 divisors (see below), whose sum is σ = 19232139744. Its totient is φ = 5592882240.

The previous prime is 11996999857. The next prime is 11996999887. The reversal of 11996999858 is 85899969911.

It is not an unprimeable number, because it can be changed into a prime (11996999857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1645208 + ... + 1652483.

It is an arithmetic number, because the mean of its divisors is an integer number (1202008734).

Almost surely, 2^11996999858 is an apocalyptic number.

11996999858 is a deficient number, since it is larger than the sum of its proper divisors (7235139886).

11996999858 is a wasteful number, since it uses less digits than its factorization.

11996999858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297817.

The product of its digits is 113374080, while the sum is 74.

The spelling of 11996999858 in words is "eleven billion, nine hundred ninety-six million, nine hundred ninety-nine thousand, eight hundred fifty-eight".