817364427690 has 32 divisors (see below), whose sum is σ = 1990953357120. Its totient is φ = 214710655104.

The previous prime is 817364427689. The next prime is 817364427713. The reversal of 817364427690 is 96724463718.

It is a super-2 number, since 2×817364427690² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 817364427690.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203322475 + ... + 203326494.

It is an arithmetic number, because the mean of its divisors is an integer number (62217292410).

Almost surely, 2^817364427690 is an apocalyptic number.

817364427690 is an abundant number, since it is smaller than the sum of its proper divisors (1173588929430).

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

817364427690 is a wasteful number, since it uses less digits than its factorization.

817364427690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406649046.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The spelling of 817364427690 in words is "eight hundred seventeen billion, three hundred sixty-four million, four hundred twenty-seven thousand, six hundred ninety".