864825945 has 32 divisors (see below), whose sum is σ = 1459382400. Its totient is φ = 436114944.

The previous prime is 864825943. The next prime is 864825971. The reversal of 864825945 is 549528468.

It is a happy number.

It is not a de Polignac number, because 864825945 - 2¹ = 864825943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864825943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159499 + ... + 164831.

It is an arithmetic number, because the mean of its divisors is an integer number (45605700).

Almost surely, 2^864825945 is an apocalyptic number.

It is an amenable number.

864825945 is a deficient number, since it is larger than the sum of its proper divisors (594556455).

864825945 is a wasteful number, since it uses less digits than its factorization.

864825945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5929.

The product of its digits is 2764800, while the sum is 51.

The square root of 864825945 is about 29407.9231670650. The cubic root of 864825945 is about 952.7440312729.

The spelling of 864825945 in words is "eight hundred sixty-four million, eight hundred twenty-five thousand, nine hundred forty-five".