25643203674 has 16 divisors (see below), whose sum is σ = 55948808160. Its totient is φ = 7770667760.

The previous prime is 25643203673. The next prime is 25643203697. The reversal of 25643203674 is 47630234652.

It is not an unprimeable number, because it can be changed into a prime (25643203673) 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 7 ways as a sum of consecutive naturals, for example, 194266629 + ... + 194266760.

It is an arithmetic number, because the mean of its divisors is an integer number (3496800510).

Almost surely, 2^25643203674 is an apocalyptic number.

25643203674 is an abundant number, since it is smaller than the sum of its proper divisors (30305604486).

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

25643203674 is a wasteful number, since it uses less digits than its factorization.

25643203674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388533405.

The product of its (nonzero) digits is 725760, while the sum is 42.

The spelling of 25643203674 in words is "twenty-five billion, six hundred forty-three million, two hundred three thousand, six hundred seventy-four".