161477266277 has 2 divisors, whose sum is σ = 161477266278. Its totient is φ = 161477266276.

The previous prime is 161477266207. The next prime is 161477266283. The reversal of 161477266277 is 772662774161.

161477266277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125164533796 + 36312732481 = 353786^2 + 190559^2 .

It is an emirp because it is prime and its reverse (772662774161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161477266277 - 2¹⁰ = 161477265253 is a prime.

It is a super-2 number, since 2×161477266277² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161477266207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80738633138 + 80738633139.

It is an arithmetic number, because the mean of its divisors is an integer number (80738633139).

Almost surely, 2^161477266277 is an apocalyptic number.

It is an amenable number.

161477266277 is a deficient number, since it is larger than the sum of its proper divisors (1).

161477266277 is an equidigital number, since it uses as much as digits as its factorization.

161477266277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8297856, while the sum is 56.

The spelling of 161477266277 in words is "one hundred sixty-one billion, four hundred seventy-seven million, two hundred sixty-six thousand, two hundred seventy-seven".