163509151778663 has 2 divisors, whose sum is σ = 163509151778664. Its totient is φ = 163509151778662.

The previous prime is 163509151778659. The next prime is 163509151778701. The reversal of 163509151778663 is 366877151905361.

It is a weak prime.

It is an emirp because it is prime and its reverse (366877151905361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163509151778663 - 2² = 163509151778659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163509151778593 and 163509151778602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163509151778963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81754575889331 + 81754575889332.

It is an arithmetic number, because the mean of its divisors is an integer number (81754575889332).

Almost surely, 2^{163509151778663} is an apocalyptic number.

163509151778663 is a deficient number, since it is larger than the sum of its proper divisors (1).

163509151778663 is an equidigital number, since it uses as much as digits as its factorization.

163509151778663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 171460800, while the sum is 68.

The spelling of 163509151778663 in words is "one hundred sixty-three trillion, five hundred nine billion, one hundred fifty-one million, seven hundred seventy-eight thousand, six hundred sixty-three".