825646841449 has 4 divisors (see below), whose sum is σ = 852280610560. Its totient is φ = 799013072340.

The previous prime is 825646841441. The next prime is 825646841479. The reversal of 825646841449 is 944148646528.

825646841449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 825646841449 - 2³ = 825646841441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825646841441) 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, 13316884509 + ... + 13316884570.

It is an arithmetic number, because the mean of its divisors is an integer number (213070152640).

Almost surely, 2^825646841449 is an apocalyptic number.

It is an amenable number.

825646841449 is a deficient number, since it is larger than the sum of its proper divisors (26633769111).

825646841449 is a wasteful number, since it uses less digits than its factorization.

825646841449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26633769110.

The product of its digits is 53084160, while the sum is 61.

The spelling of 825646841449 in words is "eight hundred twenty-five billion, six hundred forty-six million, eight hundred forty-one thousand, four hundred forty-nine".