161208282723 has 32 divisors (see below), whose sum is σ = 219315297600. Its totient is φ = 105310765056.

The previous prime is 161208282707. The next prime is 161208282749. The reversal of 161208282723 is 327282802161.

It is not a de Polignac number, because 161208282723 - 2⁴ = 161208282707 is a prime.

It is a super-2 number, since 2×161208282723² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161208282223) 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 31 ways as a sum of consecutive naturals, for example, 40411213 + ... + 40415201.

It is an arithmetic number, because the mean of its divisors is an integer number (6853603050).

Almost surely, 2^161208282723 is an apocalyptic number.

161208282723 is a deficient number, since it is larger than the sum of its proper divisors (58107014877).

161208282723 is a wasteful number, since it uses less digits than its factorization.

161208282723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5431.

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 161208282723 in words is "one hundred sixty-one billion, two hundred eight million, two hundred eighty-two thousand, seven hundred twenty-three".