204010523440 has 80 divisors (see below), whose sum is σ = 479460785760. Its totient is φ = 80724500480.

The previous prime is 204010523429. The next prime is 204010523443. The reversal of 204010523440 is 44325010402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (204010523443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3291456 + ... + 3352864.

It is an arithmetic number, because the mean of its divisors is an integer number (5993259822).

Almost surely, 2^204010523440 is an apocalyptic number.

204010523440 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 204010523440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239730392880).

204010523440 is an abundant number, since it is smaller than the sum of its proper divisors (275450262320).

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

204010523440 is a wasteful number, since it uses less digits than its factorization.

204010523440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61870 (or 61864 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 204010523440 its reverse (44325010402), we get a palindrome (248335533842).

The spelling of 204010523440 in words is "two hundred four billion, ten million, five hundred twenty-three thousand, four hundred forty".