163642872787 has 2 divisors, whose sum is σ = 163642872788. Its totient is φ = 163642872786.

The previous prime is 163642872761. The next prime is 163642872803. The reversal of 163642872787 is 787278246361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163642872787 - 2¹⁵ = 163642840019 is a prime.

It is not a weakly prime, because it can be changed into another prime (163642872187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81821436393 + 81821436394.

It is an arithmetic number, because the mean of its divisors is an integer number (81821436394).

Almost surely, 2^163642872787 is an apocalyptic number.

163642872787 is a deficient number, since it is larger than the sum of its proper divisors (1).

163642872787 is an equidigital number, since it uses as much as digits as its factorization.

163642872787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37933056, while the sum is 61.

The spelling of 163642872787 in words is "one hundred sixty-three billion, six hundred forty-two million, eight hundred seventy-two thousand, seven hundred eighty-seven".