23729778648 has 96 divisors (see below), whose sum is σ = 64814677200. Its totient is φ = 7842816000.

The previous prime is 23729778643. The next prime is 23729778671. The reversal of 23729778648 is 84687792732.

23729778648 is a `hidden beast` number, since 237 + 297 + 78 + 6 + 48 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23729778643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14821048 + ... + 14822648.

Almost surely, 2^23729778648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23729778648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32407338600).

23729778648 is an abundant number, since it is smaller than the sum of its proper divisors (41084898552).

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

23729778648 is a wasteful number, since it uses less digits than its factorization.

23729778648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233 (or 3226 counting only the distinct ones).

The product of its digits is 56899584, while the sum is 63.

The spelling of 23729778648 in words is "twenty-three billion, seven hundred twenty-nine million, seven hundred seventy-eight thousand, six hundred forty-eight".