25973811645 has 16 divisors (see below), whose sum is σ = 41560994112. Its totient is φ = 13851734400.

The previous prime is 25973811629. The next prime is 25973811653. The reversal of 25973811645 is 54611837952.

It is not a de Polignac number, because 25973811645 - 2⁴ = 25973811629 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 197769 + ... + 301761.

It is an arithmetic number, because the mean of its divisors is an integer number (2597562132).

Almost surely, 2^25973811645 is an apocalyptic number.

It is an amenable number.

25973811645 is a deficient number, since it is larger than the sum of its proper divisors (15587182467).

25973811645 is a wasteful number, since it uses less digits than its factorization.

25973811645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120652.

The product of its digits is 1814400, while the sum is 51.

The spelling of 25973811645 in words is "twenty-five billion, nine hundred seventy-three million, eight hundred eleven thousand, six hundred forty-five".