161655733 has 2 divisors, whose sum is σ = 161655734. Its totient is φ = 161655732.

The previous prime is 161655727. The next prime is 161655757. The reversal of 161655733 is 337556161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160351569 + 1304164 = 12663^2 + 1142^2 .

It is a cyclic number.

It is not a de Polignac number, because 161655733 - 2¹⁷ = 161524661 is a prime.

It is a super-2 number, since 2×161655733² = 52265152023534578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161655692 and 161655701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161655763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80827866 + 80827867.

It is an arithmetic number, because the mean of its divisors is an integer number (80827867).

Almost surely, 2^161655733 is an apocalyptic number.

It is an amenable number.

161655733 is a deficient number, since it is larger than the sum of its proper divisors (1).

161655733 is an equidigital number, since it uses as much as digits as its factorization.

161655733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 37.

The square root of 161655733 is about 12714.3907836750. The cubic root of 161655733 is about 544.7497467902.

The spelling of 161655733 in words is "one hundred sixty-one million, six hundred fifty-five thousand, seven hundred thirty-three".