817763525025 has 96 divisors (see below), whose sum is σ = 1378152292608. Its totient is φ = 427824230400.

The previous prime is 817763524969. The next prime is 817763525057. The reversal of 817763525025 is 520525367718.

It is a happy number.

It is not a de Polignac number, because 817763525025 - 2⁸ = 817763524769 is a prime.

It is a super-2 number, since 2×817763525025² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 310581109 + ... + 310583741.

It is an arithmetic number, because the mean of its divisors is an integer number (14355753048).

Almost surely, 2^817763525025 is an apocalyptic number.

It is an amenable number.

817763525025 is a deficient number, since it is larger than the sum of its proper divisors (560388767583).

817763525025 is a wasteful number, since it uses less digits than its factorization.

817763525025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131 (or 3126 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 51.

The spelling of 817763525025 in words is "eight hundred seventeen billion, seven hundred sixty-three million, five hundred twenty-five thousand, twenty-five".