25850057442 has 32 divisors (see below), whose sum is σ = 56417048640. Its totient is φ = 7831000320.

The previous prime is 25850057399. The next prime is 25850057533. The reversal of 25850057442 is 24475005852.

25850057442 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 25850057394 and 25850057403.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 169534 + ... + 283622.

It is an arithmetic number, because the mean of its divisors is an integer number (1763032770).

Almost surely, 2^25850057442 is an apocalyptic number.

25850057442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25850057442 is an abundant number, since it is smaller than the sum of its proper divisors (30566991198).

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

25850057442 is a wasteful number, since it uses less digits than its factorization.

25850057442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117538.

The product of its (nonzero) digits is 448000, while the sum is 42.

The spelling of 25850057442 in words is "twenty-five billion, eight hundred fifty million, fifty-seven thousand, four hundred forty-two".