25205442386 has 16 divisors (see below), whose sum is σ = 37984179840. Its totient is φ = 12544081200.

The previous prime is 25205442373. The next prime is 25205442391. The reversal of 25205442386 is 68324450252.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2361161 + ... + 2371811.

It is an arithmetic number, because the mean of its divisors is an integer number (2374011240).

Almost surely, 2^25205442386 is an apocalyptic number.

25205442386 is a deficient number, since it is larger than the sum of its proper divisors (12778737454).

25205442386 is a wasteful number, since it uses less digits than its factorization.

25205442386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16049.

The product of its (nonzero) digits is 460800, while the sum is 41.

The spelling of 25205442386 in words is "twenty-five billion, two hundred five million, four hundred forty-two thousand, three hundred eighty-six".