25815278082628 has 48 divisors (see below), whose sum is σ = 46076867020800. Its totient is φ = 12653074062720.

The previous prime is 25815278082593. The next prime is 25815278082697. The reversal of 25815278082628 is 82628087251852.

It is a self number, because there is not a number n which added to its sum of digits gives 25815278082628.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29385838 + ... + 30251578.

It is an arithmetic number, because the mean of its divisors is an integer number (959934729600).

Almost surely, 2^{25815278082628} is an apocalyptic number.

It is an amenable number.

25815278082628 is a deficient number, since it is larger than the sum of its proper divisors (20261588938172).

25815278082628 is a wasteful number, since it uses less digits than its factorization.

25815278082628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866500 (or 866498 counting only the distinct ones).

The product of its (nonzero) digits is 68812800, while the sum is 64.

The spelling of 25815278082628 in words is "twenty-five trillion, eight hundred fifteen billion, two hundred seventy-eight million, eighty-two thousand, six hundred twenty-eight".