23755258440 has 144 divisors (see below), whose sum is σ = 81482298300. Its totient is φ = 6001295616.

The previous prime is 23755258411. The next prime is 23755258463. The reversal of 23755258440 is 4485255732.

23755258440 is a `hidden beast` number, since 2 + 3 + 7 + 5 + 525 + 84 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 23300801316 + 454457124 = 152646^2 + 21318^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38566 + ... + 221354.

Almost surely, 2^23755258440 is an apocalyptic number.

23755258440 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 23755258440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40741149150).

23755258440 is an abundant number, since it is smaller than the sum of its proper divisors (57727039860).

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

23755258440 is a wasteful number, since it uses less digits than its factorization.

23755258440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182844 (or 182818 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 45.

The spelling of 23755258440 in words is "twenty-three billion, seven hundred fifty-five million, two hundred fifty-eight thousand, four hundred forty".