25385838757878 has 32 divisors (see below), whose sum is σ = 50787432783360. Its totient is φ = 8459320661280.

The previous prime is 25385838757871. The next prime is 25385838757879. The reversal of 25385838757878 is 87875783858352.

It is a self number, because there is not a number n which added to its sum of digits gives 25385838757878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25385838757871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577099401 + ... + 577143387.

It is an arithmetic number, because the mean of its divisors is an integer number (1587107274480).

Almost surely, 2^{25385838757878} is an apocalyptic number.

25385838757878 is an abundant number, since it is smaller than the sum of its proper divisors (25401594025482).

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

25385838757878 is a wasteful number, since it uses less digits than its factorization.

25385838757878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71652.

The product of its digits is 25288704000, while the sum is 84.

The spelling of 25385838757878 in words is "twenty-five trillion, three hundred eighty-five billion, eight hundred thirty-eight million, seven hundred fifty-seven thousand, eight hundred seventy-eight".