161279118401 has 2 divisors, whose sum is σ = 161279118402. Its totient is φ = 161279118400.

The previous prime is 161279118379. The next prime is 161279118431. The reversal of 161279118401 is 104811972161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131961460225 + 29317658176 = 363265^2 + 171224^2 .

It is a cyclic number.

It is not a de Polignac number, because 161279118401 - 2¹⁸ = 161278856257 is a prime.

It is not a weakly prime, because it can be changed into another prime (161279118431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80639559200 + 80639559201.

It is an arithmetic number, because the mean of its divisors is an integer number (80639559201).

Almost surely, 2^161279118401 is an apocalyptic number.

It is an amenable number.

161279118401 is a deficient number, since it is larger than the sum of its proper divisors (1).

161279118401 is an equidigital number, since it uses as much as digits as its factorization.

161279118401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 41.

The spelling of 161279118401 in words is "one hundred sixty-one billion, two hundred seventy-nine million, one hundred eighteen thousand, four hundred one".