161434500049 has 4 divisors (see below), whose sum is σ = 161435475364. Its totient is φ = 161433524736.

The previous prime is 161434500041. The next prime is 161434500067. The reversal of 161434500049 is 940005434161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 46486378449 + 114948121600 = 215607^2 + 339040^2 .

It is a cyclic number.

It is not a de Polignac number, because 161434500049 - 2³ = 161434500041 is a prime.

It is a super-2 number, since 2×161434500049² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161434499990 and 161434500017.

It is not an unprimeable number, because it can be changed into a prime (161434500041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170712 + ... + 593305.

It is an arithmetic number, because the mean of its divisors is an integer number (40358868841).

Almost surely, 2^161434500049 is an apocalyptic number.

It is an amenable number.

161434500049 is a deficient number, since it is larger than the sum of its proper divisors (975315).

161434500049 is an equidigital number, since it uses as much as digits as its factorization.

161434500049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975314.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 161434500049 in words is "one hundred sixty-one billion, four hundred thirty-four million, five hundred thousand, forty-nine".