23635785640 has 64 divisors (see below), whose sum is σ = 54657964800. Its totient is φ = 9195234048.

The previous prime is 23635785571. The next prime is 23635785643. The reversal of 23635785640 is 4658753632.

It is not an unprimeable number, because it can be changed into a prime (23635785643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155902 + ... + 267538.

It is an arithmetic number, because the mean of its divisors is an integer number (854030700).

Almost surely, 2^23635785640 is an apocalyptic number.

23635785640 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 23635785640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27328982400).

23635785640 is an abundant number, since it is smaller than the sum of its proper divisors (31022179160).

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

23635785640 is a wasteful number, since it uses less digits than its factorization.

23635785640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111794 (or 111790 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 23635785640 in words is "twenty-three billion, six hundred thirty-five million, seven hundred eighty-five thousand, six hundred forty".