161477267201 has 2 divisors, whose sum is σ = 161477267202. Its totient is φ = 161477267200.

The previous prime is 161477267179. The next prime is 161477267221. The reversal of 161477267201 is 102762774161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123608496400 + 37868770801 = 351580^2 + 194599^2 .

It is an emirp because it is prime and its reverse (102762774161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161477267201 - 2³⁰ = 160403525377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (161477267221) 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, 80738633600 + 80738633601.

It is an arithmetic number, because the mean of its divisors is an integer number (80738633601).

Almost surely, 2^161477267201 is an apocalyptic number.

It is an amenable number.

161477267201 is a deficient number, since it is larger than the sum of its proper divisors (1).

161477267201 is an equidigital number, since it uses as much as digits as its factorization.

161477267201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 197568, while the sum is 44.

The spelling of 161477267201 in words is "one hundred sixty-one billion, four hundred seventy-seven million, two hundred sixty-seven thousand, two hundred one".