817545480 has 32 divisors (see below), whose sum is σ = 2452636800. Its totient is φ = 218012096.

The previous prime is 817545473. The next prime is 817545497. The reversal of 817545480 is 84545718.

It is a super-2 number, since 2×817545480² = 1336761223736860800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3406320 + ... + 3406559.

It is an arithmetic number, because the mean of its divisors is an integer number (76644900).

Almost surely, 2^817545480 is an apocalyptic number.

It is an amenable number.

817545480 is an abundant number, since it is smaller than the sum of its proper divisors (1635091320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

817545480 is a wasteful number, since it uses less digits than its factorization.

817545480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6812893 (or 6812889 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 42.

The square root of 817545480 is about 28592.7522284932. The cubic root of 817545480 is about 935.0553238257.

The spelling of 817545480 in words is "eight hundred seventeen million, five hundred forty-five thousand, four hundred eighty".