25802954240 has 160 divisors (see below), whose sum is σ = 71763335424. Its totient is φ = 8714280960.

The previous prime is 25802954183. The next prime is 25802954249. The reversal of 25802954240 is 4245920852.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25802954249) 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, 1189895 + ... + 1211385.

Almost surely, 2^25802954240 is an apocalyptic number.

25802954240 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 25802954240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35881667712).

25802954240 is an abundant number, since it is smaller than the sum of its proper divisors (45960381184).

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

25802954240 is an equidigital number, since it uses as much as digits as its factorization.

25802954240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21588 (or 21572 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 25802954240 in words is "twenty-five billion, eight hundred two million, nine hundred fifty-four thousand, two hundred forty".