23142640144 has 20 divisors (see below), whose sum is σ = 48288009196. Its totient is φ = 10681218432.

The previous prime is 23142640133. The next prime is 23142640159. The reversal of 23142640144 is 44104624132.

It can be written as a sum of positive squares in 2 ways, for example, as 3657830400 + 19484809744 = 60480^2 + 139588^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55631139 + ... + 55631554.

Almost surely, 2^23142640144 is an apocalyptic number.

It is an amenable number.

23142640144 is an abundant number, since it is smaller than the sum of its proper divisors (25145369052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23142640144 is a wasteful number, since it uses less digits than its factorization.

23142640144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111262714 (or 111262708 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The spelling of 23142640144 in words is "twenty-three billion, one hundred forty-two million, six hundred forty thousand, one hundred forty-four".