25202440340 has 96 divisors (see below), whose sum is σ = 66268710144. Its totient is φ = 7821480960.

The previous prime is 25202440337. The next prime is 25202440363. The reversal of 25202440340 is 4304420252.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323702 + ... + 393938.

It is an arithmetic number, because the mean of its divisors is an integer number (690299064).

Almost surely, 2^25202440340 is an apocalyptic number.

25202440340 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 25202440340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33134355072).

25202440340 is an abundant number, since it is smaller than the sum of its proper divisors (41066269804).

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

25202440340 is a wasteful number, since it uses less digits than its factorization.

25202440340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70497 (or 70495 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

Adding to 25202440340 its reverse (4304420252), we get a palindrome (29506860592).

The spelling of 25202440340 in words is "twenty-five billion, two hundred two million, four hundred forty thousand, three hundred forty".