23297660640 has 480 divisors, whose sum is σ = 85849860096. Its totient is φ = 5943352320.

The previous prime is 23297660627. The next prime is 23297660677. The reversal of 23297660640 is 4606679232.

23297660640 is a `hidden beast` number, since 2 + 32 + 9 + 7 + 6 + 606 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 41380999 + ... + 41381561.

Almost surely, 2^23297660640 is an apocalyptic number.

23297660640 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 23297660640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42924930048).

23297660640 is an abundant number, since it is smaller than the sum of its proper divisors (62552199456).

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

23297660640 is a wasteful number, since it uses less digits than its factorization.

23297660640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 23297660640 in words is "twenty-three billion, two hundred ninety-seven million, six hundred sixty thousand, six hundred forty".