813648525 has 12 divisors (see below), whose sum is σ = 1345232352. Its totient is φ = 433945840.

The previous prime is 813648499. The next prime is 813648553. The reversal of 813648525 is 525846318.

It is not a de Polignac number, because 813648525 - 2⁶ = 813648461 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5424249 + ... + 5424398.

It is an arithmetic number, because the mean of its divisors is an integer number (112102696).

Almost surely, 2^813648525 is an apocalyptic number.

It is an amenable number.

813648525 is a deficient number, since it is larger than the sum of its proper divisors (531583827).

813648525 is a wasteful number, since it uses less digits than its factorization.

813648525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10848660 (or 10848655 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 813648525 is about 28524.5249741341. The cubic root of 813648525 is about 933.5672624378.

The spelling of 813648525 in words is "eight hundred thirteen million, six hundred forty-eight thousand, five hundred twenty-five".