25312503878 has 16 divisors (see below), whose sum is σ = 38217661440. Its totient is φ = 12573517896.

The previous prime is 25312503871. The next prime is 25312503901. The reversal of 25312503878 is 87830521352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25312503871) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 158933 + ... + 275471.

It is an arithmetic number, because the mean of its divisors is an integer number (2388603840).

Almost surely, 2^25312503878 is an apocalyptic number.

25312503878 is a deficient number, since it is larger than the sum of its proper divisors (12905157562).

25312503878 is a wasteful number, since it uses less digits than its factorization.

25312503878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117251.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 25312503878 in words is "twenty-five billion, three hundred twelve million, five hundred three thousand, eight hundred seventy-eight".