161162276431 has 16 divisors (see below), whose sum is σ = 185317203456. Its totient is φ = 138987880416.

The previous prime is 161162276417. The next prime is 161162276461. The reversal of 161162276431 is 134672261161.

It is a cyclic number.

It is not a de Polignac number, because 161162276431 - 2²³ = 161153887823 is a prime.

It is a super-2 number, since 2×161162276431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161162276461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6254635 + ... + 6280348.

It is an arithmetic number, because the mean of its divisors is an integer number (11582325216).

Almost surely, 2^161162276431 is an apocalyptic number.

161162276431 is a deficient number, since it is larger than the sum of its proper divisors (24154927025).

161162276431 is a wasteful number, since it uses less digits than its factorization.

161162276431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12535062.

The product of its digits is 72576, while the sum is 40.

The spelling of 161162276431 in words is "one hundred sixty-one billion, one hundred sixty-two million, two hundred seventy-six thousand, four hundred thirty-one".