25526263578 has 16 divisors (see below), whose sum is σ = 51054092640. Its totient is φ = 8508493616.

The previous prime is 25526263571. The next prime is 25526263597. The reversal of 25526263578 is 87536262552.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25526263578.

It is not an unprimeable number, because it can be changed into a prime (25526263571) 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 7 ways as a sum of consecutive naturals, for example, 355108 + ... + 420896.

It is an arithmetic number, because the mean of its divisors is an integer number (3190880790).

Almost surely, 2^25526263578 is an apocalyptic number.

25526263578 is an abundant number, since it is smaller than the sum of its proper divisors (25527829062).

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

25526263578 is a wasteful number, since it uses less digits than its factorization.

25526263578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130461.

The product of its digits is 6048000, while the sum is 51.

The spelling of 25526263578 in words is "twenty-five billion, five hundred twenty-six million, two hundred sixty-three thousand, five hundred seventy-eight".