25402025442 has 16 divisors (see below), whose sum is σ = 51084738432. Its totient is φ = 8420560560.

The previous prime is 25402025437. The next prime is 25402025443. The reversal of 25402025442 is 24452020452.

It is not an unprimeable number, because it can be changed into a prime (25402025443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11694138 + ... + 11696309.

It is an arithmetic number, because the mean of its divisors is an integer number (3192796152).

Almost surely, 2^25402025442 is an apocalyptic number.

25402025442 is an abundant number, since it is smaller than the sum of its proper divisors (25682712990).

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

25402025442 is a wasteful number, since it uses less digits than its factorization.

25402025442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23390633.

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

Adding to 25402025442 its reverse (24452020452), we get a palindrome (49854045894).

The spelling of 25402025442 in words is "twenty-five billion, four hundred two million, twenty-five thousand, four hundred forty-two".