161683617082 has 8 divisors (see below), whose sum is σ = 261181227636. Its totient is φ = 74623207872.

The previous prime is 161683617071. The next prime is 161683617091. The reversal of 161683617082 is 280716386161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 153758878641 + 7924738441 = 392121^2 + 89021^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161683617082² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3109300303 + ... + 3109300354.

Almost surely, 2^161683617082 is an apocalyptic number.

161683617082 is a deficient number, since it is larger than the sum of its proper divisors (99497610554).

161683617082 is a wasteful number, since it uses less digits than its factorization.

161683617082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6218600672.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 161683617082 in words is "one hundred sixty-one billion, six hundred eighty-three million, six hundred seventeen thousand, eighty-two".