25527502506 has 64 divisors (see below), whose sum is σ = 56757335040. Its totient is φ = 7588794240.

The previous prime is 25527502501. The next prime is 25527502529. The reversal of 25527502506 is 60520572552.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (25527502501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1952166 + ... + 1965198.

It is an arithmetic number, because the mean of its divisors is an integer number (886833360).

Almost surely, 2^25527502506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25527502506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28378667520).

25527502506 is an abundant number, since it is smaller than the sum of its proper divisors (31229832534).

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

25527502506 is a wasteful number, since it uses less digits than its factorization.

25527502506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13611.

The product of its (nonzero) digits is 210000, while the sum is 39.

The spelling of 25527502506 in words is "twenty-five billion, five hundred twenty-seven million, five hundred two thousand, five hundred six".