25193656141 has 4 divisors (see below), whose sum is σ = 26675635932. Its totient is φ = 23711676352.

The previous prime is 25193656133. The next prime is 25193656153. The reversal of 25193656141 is 14165639152.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7035015625 + 18158640516 = 83875^2 + 134754^2 .

It is a cyclic number.

It is not a de Polignac number, because 25193656141 - 2³ = 25193656133 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 (25193656171) 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, 740989870 + ... + 740989903.

It is an arithmetic number, because the mean of its divisors is an integer number (6668908983).

Almost surely, 2^25193656141 is an apocalyptic number.

It is an amenable number.

25193656141 is a deficient number, since it is larger than the sum of its proper divisors (1481979791).

25193656141 is a wasteful number, since it uses less digits than its factorization.

25193656141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481979790.

The product of its digits is 194400, while the sum is 43.

The spelling of 25193656141 in words is "twenty-five billion, one hundred ninety-three million, six hundred fifty-six thousand, one hundred forty-one".