820694439395 has 32 divisors (see below), whose sum is σ = 1020837988800. Its totient is φ = 632644701696.

The previous prime is 820694439373. The next prime is 820694439431. The reversal of 820694439395 is 593934496028.

It is a cyclic number.

It is not a de Polignac number, because 820694439395 - 2¹⁴ = 820694423011 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 293418137 + ... + 293420933.

It is an arithmetic number, because the mean of its divisors is an integer number (31901187150).

Almost surely, 2^820694439395 is an apocalyptic number.

820694439395 is a deficient number, since it is larger than the sum of its proper divisors (200143549405).

820694439395 is a wasteful number, since it uses less digits than its factorization.

820694439395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6167.

The product of its (nonzero) digits is 50388480, while the sum is 62.

The spelling of 820694439395 in words is "eight hundred twenty billion, six hundred ninety-four million, four hundred thirty-nine thousand, three hundred ninety-five".