25878364121427 has 64 divisors (see below), whose sum is σ = 36902020248576. Its totient is φ = 16094750031360.

The previous prime is 25878364121387. The next prime is 25878364121443. The reversal of 25878364121427 is 72412146387852.

It is not a de Polignac number, because 25878364121427 - 2¹⁰ = 25878364120403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25878364121327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 658178173 + ... + 658217489.

It is an arithmetic number, because the mean of its divisors is an integer number (576594066384).

Almost surely, 2^{25878364121427} is an apocalyptic number.

25878364121427 is a deficient number, since it is larger than the sum of its proper divisors (11023656127149).

25878364121427 is a wasteful number, since it uses less digits than its factorization.

25878364121427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40460.

The product of its digits is 36126720, while the sum is 60.

The spelling of 25878364121427 in words is "twenty-five trillion, eight hundred seventy-eight billion, three hundred sixty-four million, one hundred twenty-one thousand, four hundred twenty-seven".