820655737795 has 4 divisors (see below), whose sum is σ = 984786885360. Its totient is φ = 656524590232.

The previous prime is 820655737789. The next prime is 820655737877. The reversal of 820655737795 is 597737556028.

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

It is a cyclic number.

It is not a de Polignac number, because 820655737795 - 2¹⁵ = 820655705027 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82065573775 + ... + 82065573784.

It is an arithmetic number, because the mean of its divisors is an integer number (246196721340).

Almost surely, 2^820655737795 is an apocalyptic number.

820655737795 is a deficient number, since it is larger than the sum of its proper divisors (164131147565).

820655737795 is a wasteful number, since it uses less digits than its factorization.

820655737795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164131147564.

The product of its (nonzero) digits is 111132000, while the sum is 64.

The spelling of 820655737795 in words is "eight hundred twenty billion, six hundred fifty-five million, seven hundred thirty-seven thousand, seven hundred ninety-five".