825509912 has 32 divisors (see below), whose sum is σ = 1601078400. Its totient is φ = 398611200.

The previous prime is 825509899. The next prime is 825509921. The reversal of 825509912 is 219905528.

It is a super-2 number, since 2×825509912² = 1362933229620495488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 825509912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126014 + ... + 132402.

It is an arithmetic number, because the mean of its divisors is an integer number (50033700).

Almost surely, 2^825509912 is an apocalyptic number.

It is an amenable number.

825509912 is a deficient number, since it is larger than the sum of its proper divisors (775568488).

825509912 is a wasteful number, since it uses less digits than its factorization.

825509912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6947 (or 6943 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 825509912 is about 28731.6882901092. The cubic root of 825509912 is about 938.0819164597.

The spelling of 825509912 in words is "eight hundred twenty-five million, five hundred nine thousand, nine hundred twelve".