25705066842 has 48 divisors (see below), whose sum is σ = 68546849280. Its totient is φ = 6779357856.

The previous prime is 25705066759. The next prime is 25705066901. The reversal of 25705066842 is 24866050752.

It is a super-2 number, since 2×25705066842² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7844842 + ... + 7848117.

It is an arithmetic number, because the mean of its divisors is an integer number (1428059360).

Almost surely, 2^25705066842 is an apocalyptic number.

25705066842 is an abundant number, since it is smaller than the sum of its proper divisors (42841782438).

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

25705066842 is a wasteful number, since it uses less digits than its factorization.

25705066842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15692987 (or 15692984 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 25705066842 in words is "twenty-five billion, seven hundred five million, sixty-six thousand, eight hundred forty-two".