817673366072 has 8 divisors (see below), whose sum is σ = 1533137561400. Its totient is φ = 408836683032.

The previous prime is 817673366011. The next prime is 817673366089. The reversal of 817673366072 is 270663376718.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 817673365999 and 817673366017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51104585372 + ... + 51104585387.

It is an arithmetic number, because the mean of its divisors is an integer number (191642195175).

Almost surely, 2^817673366072 is an apocalyptic number.

It is an amenable number.

817673366072 is a deficient number, since it is larger than the sum of its proper divisors (715464195328).

817673366072 is a wasteful number, since it uses less digits than its factorization.

817673366072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102209170765 (or 102209170761 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 56.

The spelling of 817673366072 in words is "eight hundred seventeen billion, six hundred seventy-three million, three hundred sixty-six thousand, seventy-two".