23505275640 has 512 divisors, whose sum is σ = 91010304000. Its totient is φ = 4714536960.

The previous prime is 23505275617. The next prime is 23505275671. The reversal of 23505275640 is 4657250532.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 67350186 + ... + 67350534.

It is an arithmetic number, because the mean of its divisors is an integer number (177754500).

Almost surely, 2^23505275640 is an apocalyptic number.

23505275640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23505275640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45505152000).

23505275640 is an abundant number, since it is smaller than the sum of its proper divisors (67505028360).

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

23505275640 is a wasteful number, since it uses less digits than its factorization.

23505275640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 39.

The spelling of 23505275640 in words is "twenty-three billion, five hundred five million, two hundred seventy-five thousand, six hundred forty".