161849886 has 16 divisors (see below), whose sum is σ = 353127168. Its totient is φ = 49045400.

The previous prime is 161849867. The next prime is 161849927. The reversal of 161849886 is 688948161.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1226070 + ... + 1226201.

It is an arithmetic number, because the mean of its divisors is an integer number (22070448).

Almost surely, 2^161849886 is an apocalyptic number.

161849886 is an abundant number, since it is smaller than the sum of its proper divisors (191277282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161849886 is a wasteful number, since it uses less digits than its factorization.

161849886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452287.

The product of its digits is 663552, while the sum is 51.

The square root of 161849886 is about 12722.0236597799. The cubic root of 161849886 is about 544.9677460361.

It can be divided in two parts, 161849 and 886, that added together give a triangular number (162735 = T₅₇₀).

The spelling of 161849886 in words is "one hundred sixty-one million, eight hundred forty-nine thousand, eight hundred eighty-six".