820964749718 has 4 divisors (see below), whose sum is σ = 1231447124580. Its totient is φ = 410482374858.

The previous prime is 820964749711. The next prime is 820964749763. The reversal of 820964749718 is 817947469028.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820964749711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205241187428 + ... + 205241187431.

It is an arithmetic number, because the mean of its divisors is an integer number (307861781145).

Almost surely, 2^820964749718 is an apocalyptic number.

820964749718 is a deficient number, since it is larger than the sum of its proper divisors (410482374862).

820964749718 is a wasteful number, since it uses less digits than its factorization.

820964749718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410482374861.

The product of its (nonzero) digits is 48771072, while the sum is 65.

The spelling of 820964749718 in words is "eight hundred twenty billion, nine hundred sixty-four million, seven hundred forty-nine thousand, seven hundred eighteen".