23661189489 has 16 divisors (see below), whose sum is σ = 36059649920. Its totient is φ = 13518990720.

The previous prime is 23661189481. The next prime is 23661189511. The reversal of 23661189489 is 98498116632.

It is not a de Polignac number, because 23661189489 - 2³ = 23661189481 is a prime.

It is a super-2 number, since 2×23661189489² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23661189481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112827 + ... + 245055.

It is an arithmetic number, because the mean of its divisors is an integer number (2253728120).

Almost surely, 2^23661189489 is an apocalyptic number.

It is an amenable number.

23661189489 is a deficient number, since it is larger than the sum of its proper divisors (12398460431).

23661189489 is a wasteful number, since it uses less digits than its factorization.

23661189489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140760.

The product of its digits is 4478976, while the sum is 57.

The spelling of 23661189489 in words is "twenty-three billion, six hundred sixty-one million, one hundred eighty-nine thousand, four hundred eighty-nine".