25543030645 has 16 divisors (see below), whose sum is σ = 33909114240. Its totient is φ = 18315102400.

The previous prime is 25543030633. The next prime is 25543030649. The reversal of 25543030645 is 54603034552.

It is not a de Polignac number, because 25543030645 - 2⁷ = 25543030517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25543030649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3266650 + ... + 3274459.

It is an arithmetic number, because the mean of its divisors is an integer number (2119319640).

Almost surely, 2^25543030645 is an apocalyptic number.

It is an amenable number.

25543030645 is a deficient number, since it is larger than the sum of its proper divisors (8366083595).

25543030645 is a wasteful number, since it uses less digits than its factorization.

25543030645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6541196.

The product of its (nonzero) digits is 216000, while the sum is 37.

The spelling of 25543030645 in words is "twenty-five billion, five hundred forty-three million, thirty thousand, six hundred forty-five".