25295535078 has 64 divisors (see below), whose sum is σ = 56546767872. Its totient is φ = 7477966080.

The previous prime is 25295535071. The next prime is 25295535119. The reversal of 25295535078 is 87053559252.

It is a self number, because there is not a number n which added to its sum of digits gives 25295535078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25295535071) 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 31 ways as a sum of consecutive naturals, for example, 957900 + ... + 983952.

It is an arithmetic number, because the mean of its divisors is an integer number (883543248).

Almost surely, 2^25295535078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25295535078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28273383936).

25295535078 is an abundant number, since it is smaller than the sum of its proper divisors (31251232794).

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

25295535078 is a wasteful number, since it uses less digits than its factorization.

25295535078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26429.

The product of its (nonzero) digits is 3780000, while the sum is 51.

The spelling of 25295535078 in words is "twenty-five billion, two hundred ninety-five million, five hundred thirty-five thousand, seventy-eight".