817625534940 has 96 divisors (see below), whose sum is σ = 2544415944000. Its totient is φ = 217974157056.

The previous prime is 817625534899. The next prime is 817625534953. The reversal of 817625534940 is 49435526718.

It is a happy number.

817625534940 is a `hidden beast` number, since 8 + 1 + 7 + 6 + 2 + 553 + 49 + 40 = 666.

It is a super-3 number, since 3×817625534940³ (a number of 37 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1798746 + ... + 2206974.

It is an arithmetic number, because the mean of its divisors is an integer number (26504332750).

It is a 1-persistent number, because it is pandigital, but 2⋅817625534940 = 1635251069880 is not.

Almost surely, 2^817625534940 is an apocalyptic number.

It is an amenable number.

817625534940 is an abundant number, since it is smaller than the sum of its proper divisors (1726790409060).

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

817625534940 is a wasteful number, since it uses less digits than its factorization.

817625534940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411956 (or 411948 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 817625534940 in words is "eight hundred seventeen billion, six hundred twenty-five million, five hundred thirty-four thousand, nine hundred forty".