163992315401 has 2 divisors, whose sum is σ = 163992315402. Its totient is φ = 163992315400.

The previous prime is 163992315373. The next prime is 163992315451. The reversal of 163992315401 is 104513299361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146382760000 + 17609555401 = 382600^2 + 132701^2 .

It is an emirp because it is prime and its reverse (104513299361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163992315401 - 2¹⁴ = 163992299017 is a prime.

It is not a weakly prime, because it can be changed into another prime (163992315451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81996157700 + 81996157701.

It is an arithmetic number, because the mean of its divisors is an integer number (81996157701).

Almost surely, 2^163992315401 is an apocalyptic number.

It is an amenable number.

163992315401 is a deficient number, since it is larger than the sum of its proper divisors (1).

163992315401 is an equidigital number, since it uses as much as digits as its factorization.

163992315401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 163992315401 in words is "one hundred sixty-three billion, nine hundred ninety-two million, three hundred fifteen thousand, four hundred one".