161199508 has 12 divisors (see below), whose sum is σ = 298693332. Its totient is φ = 75858560.

The previous prime is 161199503. The next prime is 161199509. The reversal of 161199508 is 805991161.

It can be written as a sum of positive squares in 2 ways, for example, as 78535044 + 82664464 = 8862^2 + 9092^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161199503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1185223 + ... + 1185358.

It is an arithmetic number, because the mean of its divisors is an integer number (24891111).

Almost surely, 2^161199508 is an apocalyptic number.

It is an amenable number.

161199508 is a deficient number, since it is larger than the sum of its proper divisors (137493824).

161199508 is a wasteful number, since it uses less digits than its factorization.

161199508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370602 (or 2370600 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 161199508 is about 12696.4368229831. The cubic root of 161199508 is about 544.2367994814.

The spelling of 161199508 in words is "one hundred sixty-one million, one hundred ninety-nine thousand, five hundred eight".