161481575767599 has 6 divisors (see below), whose sum is σ = 233251164997656. Its totient is φ = 107654383845060.

The previous prime is 161481575767579. The next prime is 161481575767609. The reversal of 161481575767599 is 995767575184161.

161481575767599 is a `hidden beast` number, since 1 + 6 + 1 + 4 + 8 + 15 + 7 + 5 + 7 + 6 + 7 + 599 = 666.

It is not a de Polignac number, because 161481575767599 - 2⁹ = 161481575767087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161481575767559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8971198653747 + ... + 8971198653764.

It is an arithmetic number, because the mean of its divisors is an integer number (38875194166276).

Almost surely, 2^{161481575767599} is an apocalyptic number.

161481575767599 is a deficient number, since it is larger than the sum of its proper divisors (71769589230057).

161481575767599 is a wasteful number, since it uses less digits than its factorization.

161481575767599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17942397307517 (or 17942397307514 counting only the distinct ones).

The product of its digits is 4000752000, while the sum is 81.

The spelling of 161481575767599 in words is "one hundred sixty-one trillion, four hundred eighty-one billion, five hundred seventy-five million, seven hundred sixty-seven thousand, five hundred ninety-nine".