163820403585699 has 16 divisors (see below), whose sum is σ = 249631308830208. Its totient is φ = 93611577572352.

The previous prime is 163820403585653. The next prime is 163820403585719. The reversal of 163820403585699 is 996585304028361.

It is not a de Polignac number, because 163820403585699 - 2¹² = 163820403581603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163820403585649) 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, 28001379 + ... + 33342435.

It is an arithmetic number, because the mean of its divisors is an integer number (15601956801888).

Almost surely, 2^{163820403585699} is an apocalyptic number.

163820403585699 is a deficient number, since it is larger than the sum of its proper divisors (85810905244509).

163820403585699 is a wasteful number, since it uses less digits than its factorization.

163820403585699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6801634.

The product of its (nonzero) digits is 335923200, while the sum is 69.

The spelling of 163820403585699 in words is "one hundred sixty-three trillion, eight hundred twenty billion, four hundred three million, five hundred eighty-five thousand, six hundred ninety-nine".