23151978866 has 16 divisors (see below), whose sum is σ = 35126784000. Its totient is φ = 11443114848.

The previous prime is 23151978821. The next prime is 23151978869. The reversal of 23151978866 is 66887915132.

It is not an unprimeable number, because it can be changed into a prime (23151978869) 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, 840671 + ... + 867773.

It is an arithmetic number, because the mean of its divisors is an integer number (2195424000).

Almost surely, 2^23151978866 is an apocalyptic number.

23151978866 is a deficient number, since it is larger than the sum of its proper divisors (11974805134).

23151978866 is a wasteful number, since it uses less digits than its factorization.

23151978866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31993.

The product of its digits is 4354560, while the sum is 56.

The spelling of 23151978866 in words is "twenty-three billion, one hundred fifty-one million, nine hundred seventy-eight thousand, eight hundred sixty-six".