161462125261 has 2 divisors, whose sum is σ = 161462125262. Its totient is φ = 161462125260.

The previous prime is 161462125219. The next prime is 161462125271. The reversal of 161462125261 is 162521264161.

161462125261 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., 99843992361 + 61618132900 = 315981^2 + 248230^2 .

It is a cyclic number.

It is not a de Polignac number, because 161462125261 - 2³¹ = 159314641613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161462125261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161462125271) 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, 80731062630 + 80731062631.

It is an arithmetic number, because the mean of its divisors is an integer number (80731062631).

Almost surely, 2^161462125261 is an apocalyptic number.

It is an amenable number.

161462125261 is a deficient number, since it is larger than the sum of its proper divisors (1).

161462125261 is an equidigital number, since it uses as much as digits as its factorization.

161462125261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The spelling of 161462125261 in words is "one hundred sixty-one billion, four hundred sixty-two million, one hundred twenty-five thousand, two hundred sixty-one".