816677617812 has 48 divisors (see below), whose sum is σ = 2181325386240. Its totient is φ = 232959490272.

The previous prime is 816677617729. The next prime is 816677617817. The reversal of 816677617812 is 218716776618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816677617817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7801278 + ... + 7905269.

It is an arithmetic number, because the mean of its divisors is an integer number (45444278880).

Almost surely, 2^816677617812 is an apocalyptic number.

It is an amenable number.

816677617812 is an abundant number, since it is smaller than the sum of its proper divisors (1364647768428).

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

816677617812 is a wasteful number, since it uses less digits than its factorization.

816677617812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15707180 (or 15707178 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 60.

The spelling of 816677617812 in words is "eight hundred sixteen billion, six hundred seventy-seven million, six hundred seventeen thousand, eight hundred twelve".