161123519662497 has 18 divisors (see below), whose sum is σ = 270731356168338. Its totient is φ = 92070582664032.

The previous prime is 161123519662477. The next prime is 161123519662541. The reversal of 161123519662497 is 794266915321161.

161123519662497 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 2 + 3 + 51 + 96 + 6 + 2 + 497 = 666.

It can be written as a sum of positive squares in only one way, i.e., 143168308367616 + 17955211294881 = 11965296^2 + 4237359^2 .

It is not a de Polignac number, because 161123519662497 - 2¹⁵ = 161123519629729 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (161123519662477) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 182679727068 + ... + 182679727949.

It is an arithmetic number, because the mean of its divisors is an integer number (15040630898241).

Almost surely, 2^{161123519662497} is an apocalyptic number.

It is an amenable number.

161123519662497 is a deficient number, since it is larger than the sum of its proper divisors (109607836505841).

161123519662497 is a wasteful number, since it uses less digits than its factorization.

161123519662497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365359455037 (or 365359455027 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 161123519662497 in words is "one hundred sixty-one trillion, one hundred twenty-three billion, five hundred nineteen million, six hundred sixty-two thousand, four hundred ninety-seven".