163065781001 has 2 divisors, whose sum is σ = 163065781002. Its totient is φ = 163065781000.

The previous prime is 163065780991. The next prime is 163065781061. The reversal of 163065781001 is 100187560361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85628805376 + 77436975625 = 292624^2 + 278275^2 .

It is a cyclic number.

It is not a de Polignac number, because 163065781001 - 2¹⁰ = 163065779977 is a prime.

It is not a weakly prime, because it can be changed into another prime (163065781061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81532890500 + 81532890501.

It is an arithmetic number, because the mean of its divisors is an integer number (81532890501).

Almost surely, 2^163065781001 is an apocalyptic number.

It is an amenable number.

163065781001 is a deficient number, since it is larger than the sum of its proper divisors (1).

163065781001 is an equidigital number, since it uses as much as digits as its factorization.

163065781001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 163065781001 in words is "one hundred sixty-three billion, sixty-five million, seven hundred eighty-one thousand, one".