235723538640 has 160 divisors (see below), whose sum is σ = 742040006400. Its totient is φ = 61890232320.

The previous prime is 235723538591. The next prime is 235723538663. The reversal of 235723538640 is 46835327532.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 235723538640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13094766 + ... + 13112754.

It is an arithmetic number, because the mean of its divisors is an integer number (4637750040).

Almost surely, 2^235723538640 is an apocalyptic number.

235723538640 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 235723538640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371020003200).

235723538640 is an abundant number, since it is smaller than the sum of its proper divisors (506316467760).

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

235723538640 is a wasteful number, since it uses less digits than its factorization.

235723538640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18845 (or 18839 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 48.

The spelling of 235723538640 in words is "two hundred thirty-five billion, seven hundred twenty-three million, five hundred thirty-eight thousand, six hundred forty".