25823436645 has 64 divisors (see below), whose sum is σ = 45696130560. Its totient is φ = 12386254848.

The previous prime is 25823436643. The next prime is 25823436659. The reversal of 25823436645 is 54663432852.

It is not a de Polignac number, because 25823436645 - 2¹ = 25823436643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25823436594 and 25823436603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25823436641) 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 63 ways as a sum of consecutive naturals, for example, 8731507 + ... + 8734463.

It is an arithmetic number, because the mean of its divisors is an integer number (714002040).

Almost surely, 2^25823436645 is an apocalyptic number.

It is an amenable number.

25823436645 is a deficient number, since it is larger than the sum of its proper divisors (19872693915).

25823436645 is a wasteful number, since it uses less digits than its factorization.

25823436645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4494.

The product of its digits is 4147200, while the sum is 48.

The spelling of 25823436645 in words is "twenty-five billion, eight hundred twenty-three million, four hundred thirty-six thousand, six hundred forty-five".