25403501242 has 32 divisors (see below), whose sum is σ = 46908186624. Its totient is φ = 10077922800.

The previous prime is 25403501213. The next prime is 25403501243. The reversal of 25403501242 is 24210530452.

It is a self number, because there is not a number n which added to its sum of digits gives 25403501242.

It is not an unprimeable number, because it can be changed into a prime (25403501243) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1262484 + ... + 1282447.

It is an arithmetic number, because the mean of its divisors is an integer number (1465880832).

Almost surely, 2^25403501242 is an apocalyptic number.

25403501242 is a deficient number, since it is larger than the sum of its proper divisors (21504685382).

25403501242 is a wasteful number, since it uses less digits than its factorization.

25403501242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544994.

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 25403501242 in words is "twenty-five billion, four hundred three million, five hundred one thousand, two hundred forty-two".