25409716242 has 16 divisors (see below), whose sum is σ = 50837952000. Its totient is φ = 8466818832.

The previous prime is 25409716193. The next prime is 25409716243. The reversal of 25409716242 is 24261790452.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25409716194 and 25409716203.

It is not an unprimeable number, because it can be changed into a prime (25409716243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753778 + ... + 786765.

It is an arithmetic number, because the mean of its divisors is an integer number (3177372000).

Almost surely, 2^25409716242 is an apocalyptic number.

25409716242 is an abundant number, since it is smaller than the sum of its proper divisors (25428235758).

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

25409716242 is a wasteful number, since it uses less digits than its factorization.

25409716242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543297.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 25409716242 in words is "twenty-five billion, four hundred nine million, seven hundred sixteen thousand, two hundred forty-two".