25878281712 has 40 divisors (see below), whose sum is σ = 66874447440. Its totient is φ = 8623226880.

The previous prime is 25878281701. The next prime is 25878281717. The reversal of 25878281712 is 21718287852.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25878281717) 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 7 ways as a sum of consecutive naturals, for example, 58864 + ... + 234992.

It is an arithmetic number, because the mean of its divisors is an integer number (1671861186).

Almost surely, 2^25878281712 is an apocalyptic number.

It is an amenable number.

25878281712 is an abundant number, since it is smaller than the sum of its proper divisors (40996165728).

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

25878281712 is a wasteful number, since it uses less digits than its factorization.

25878281712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179201 (or 179195 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 51.

The spelling of 25878281712 in words is "twenty-five billion, eight hundred seventy-eight million, two hundred eighty-one thousand, seven hundred twelve".