25354155643 has 4 divisors (see below), whose sum is σ = 25364561920. Its totient is φ = 25343749368.

The previous prime is 25354155601. The next prime is 25354155677. The reversal of 25354155643 is 34655145352.

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 25354155643 - 2¹⁷ = 25354024571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25354155643.

It is not an unprimeable number, because it can be changed into a prime (25354155143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5199483 + ... + 5204356.

It is an arithmetic number, because the mean of its divisors is an integer number (6341140480).

Almost surely, 2^25354155643 is an apocalyptic number.

25354155643 is a deficient number, since it is larger than the sum of its proper divisors (10406277).

25354155643 is a wasteful number, since it uses less digits than its factorization.

25354155643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10406276.

The product of its digits is 1080000, while the sum is 43.

The spelling of 25354155643 in words is "twenty-five billion, three hundred fifty-four million, one hundred fifty-five thousand, six hundred forty-three".