25202244540 has 48 divisors (see below), whose sum is σ = 76981403520. Its totient is φ = 6109634880.

The previous prime is 25202244523. The next prime is 25202244547. The reversal of 25202244540 is 4544220252.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25202244498 and 25202244507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25202244547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19091950 + ... + 19093269.

It is an arithmetic number, because the mean of its divisors is an integer number (1603779240).

Almost surely, 2^25202244540 is an apocalyptic number.

25202244540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25202244540 is an abundant number, since it is smaller than the sum of its proper divisors (51779158980).

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

25202244540 is a wasteful number, since it uses less digits than its factorization.

25202244540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38185242 (or 38185240 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 30.

Adding to 25202244540 its reverse (4544220252), we get a palindrome (29746464792).

The spelling of 25202244540 in words is "twenty-five billion, two hundred two million, two hundred forty-four thousand, five hundred forty".