825857761 has 4 divisors (see below), whose sum is σ = 830008000. Its totient is φ = 821707524.

The previous prime is 825857693. The next prime is 825857771. The reversal of 825857761 is 167758528.

825857761 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 a de Polignac number, because none of the positive numbers 2^k-825857761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825857771) 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, 2074821 + ... + 2075218.

It is an arithmetic number, because the mean of its divisors is an integer number (207502000).

Almost surely, 2^825857761 is an apocalyptic number.

It is an amenable number.

825857761 is a deficient number, since it is larger than the sum of its proper divisors (4150239).

825857761 is a wasteful number, since it uses less digits than its factorization.

825857761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150238.

The product of its digits is 940800, while the sum is 49.

The square root of 825857761 is about 28737.7410559703. The cubic root of 825857761 is about 938.2136592890.

The spelling of 825857761 in words is "eight hundred twenty-five million, eight hundred fifty-seven thousand, seven hundred sixty-one".