25645204634 has 16 divisors (see below), whose sum is σ = 44010149568. Its totient is φ = 10979066592.

The previous prime is 25645204603. The next prime is 25645204639. The reversal of 25645204634 is 43640254652.

It is a junction number, because it is equal to n+sod(n) for n = 25645204591 and 25645204600.

It is not an unprimeable number, because it can be changed into a prime (25645204639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964364 + ... + 990599.

It is an arithmetic number, because the mean of its divisors is an integer number (2750634348).

Almost surely, 2^25645204634 is an apocalyptic number.

25645204634 is a deficient number, since it is larger than the sum of its proper divisors (18364944934).

25645204634 is a wasteful number, since it uses less digits than its factorization.

25645204634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955909.

The product of its (nonzero) digits is 691200, while the sum is 41.

The spelling of 25645204634 in words is "twenty-five billion, six hundred forty-five million, two hundred four thousand, six hundred thirty-four".