161288975513 has 2 divisors, whose sum is σ = 161288975514. Its totient is φ = 161288975512.

The previous prime is 161288975503. The next prime is 161288975567. The reversal of 161288975513 is 315579882161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159322319104 + 1966656409 = 399152^2 + 44347^2 .

It is a cyclic number.

It is not a de Polignac number, because 161288975513 - 2¹⁴ = 161288959129 is a prime.

It is a super-2 number, since 2×161288975513² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161288975503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80644487756 + 80644487757.

It is an arithmetic number, because the mean of its divisors is an integer number (80644487757).

Almost surely, 2^161288975513 is an apocalyptic number.

It is an amenable number.

161288975513 is a deficient number, since it is larger than the sum of its proper divisors (1).

161288975513 is an equidigital number, since it uses as much as digits as its factorization.

161288975513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 56.

The spelling of 161288975513 in words is "one hundred sixty-one billion, two hundred eighty-eight million, nine hundred seventy-five thousand, five hundred thirteen".