25446533445661 has 4 divisors (see below), whose sum is σ = 25467204879424. Its totient is φ = 25425862011900.

The previous prime is 25446533445611. The next prime is 25446533445667. The reversal of 25446533445661 is 16654433564452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25446533445661 - 2¹⁹ = 25446532921373 is a prime.

It is a super-2 number, since 2×25446533445661² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25446533445596 and 25446533445605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25446533445667) 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, 10335715035 + ... + 10335717496.

It is an arithmetic number, because the mean of its divisors is an integer number (6366801219856).

Almost surely, 2^{25446533445661} is an apocalyptic number.

It is an amenable number.

25446533445661 is a deficient number, since it is larger than the sum of its proper divisors (20671433763).

25446533445661 is a wasteful number, since it uses less digits than its factorization.

25446533445661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20671433762.

The product of its digits is 124416000, while the sum is 58.

The spelling of 25446533445661 in words is "twenty-five trillion, four hundred forty-six billion, five hundred thirty-three million, four hundred forty-five thousand, six hundred sixty-one".