23691188128 has 36 divisors (see below), whose sum is σ = 46744292322. Its totient is φ = 11819665280.

The previous prime is 23691188123. The next prime is 23691188159. The reversal of 23691188128 is 82188119632.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19146810384 + 4544377744 = 138372^2 + 67412^2 .

It is a super-2 number, since 2×23691188128² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23691188123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25176138 + ... + 25177078.

Almost surely, 2^23691188128 is an apocalyptic number.

It is an amenable number.

23691188128 is a deficient number, since it is larger than the sum of its proper divisors (23053104194).

23691188128 is an frugal number, since it uses more digits than its factorization.

23691188128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725 (or 1830 counting only the distinct ones).

The product of its digits is 331776, while the sum is 49.

The spelling of 23691188128 in words is "twenty-three billion, six hundred ninety-one million, one hundred eighty-eight thousand, one hundred twenty-eight".