817761252012 has 24 divisors (see below), whose sum is σ = 1991070875136. Its totient is φ = 260735471568.

The previous prime is 817761251971. The next prime is 817761252017. The reversal of 817761252012 is 210252167718.

It is not an unprimeable number, because it can be changed into a prime (817761252017) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1481451268 + ... + 1481451819.

It is an arithmetic number, because the mean of its divisors is an integer number (82961286464).

Almost surely, 2^817761252012 is an apocalyptic number.

It is an amenable number.

817761252012 is an abundant number, since it is smaller than the sum of its proper divisors (1173309623124).

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

817761252012 is a wasteful number, since it uses less digits than its factorization.

817761252012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962903117 (or 2962903115 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The spelling of 817761252012 in words is "eight hundred seventeen billion, seven hundred sixty-one million, two hundred fifty-two thousand, twelve".