25493045492543 has 4 divisors (see below), whose sum is σ = 25493082879528. Its totient is φ = 25493008105560.

The previous prime is 25493045492533. The next prime is 25493045492623. The reversal of 25493045492543 is 34529454039452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25493045492543 - 2⁴ = 25493045492527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25493045492533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17651321 + ... + 19040882.

It is an arithmetic number, because the mean of its divisors is an integer number (6373270719882).

Almost surely, 2^{25493045492543} is an apocalyptic number.

25493045492543 is a deficient number, since it is larger than the sum of its proper divisors (37386985).

25493045492543 is an equidigital number, since it uses as much as digits as its factorization.

25493045492543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37386984.

The product of its (nonzero) digits is 93312000, while the sum is 59.

The spelling of 25493045492543 in words is "twenty-five trillion, four hundred ninety-three billion, forty-five million, four hundred ninety-two thousand, five hundred forty-three".