25553354543 has 4 divisors (see below), whose sum is σ = 26898267960. Its totient is φ = 24208441128.

The previous prime is 25553354531. The next prime is 25553354557. The reversal of 25553354543 is 34545335552.

It is a happy number.

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 25553354543 - 2¹⁰ = 25553353519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25553354494 and 25553354503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25553354573) 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, 672456680 + ... + 672456717.

It is an arithmetic number, because the mean of its divisors is an integer number (6724566990).

Almost surely, 2^25553354543 is an apocalyptic number.

25553354543 is a deficient number, since it is larger than the sum of its proper divisors (1344913417).

25553354543 is a wasteful number, since it uses less digits than its factorization.

25553354543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344913416.

The product of its digits is 2700000, while the sum is 44.

The spelling of 25553354543 in words is "twenty-five billion, five hundred fifty-three million, three hundred fifty-four thousand, five hundred forty-three".