161499801 has 8 divisors (see below), whose sum is σ = 222279424. Its totient is φ = 104193360.

The previous prime is 161499797. The next prime is 161499803. The reversal of 161499801 is 108994161.

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

It is not a de Polignac number, because 161499801 - 2² = 161499797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161499801.

It is not an unprimeable number, because it can be changed into a prime (161499803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 868186 + ... + 868371.

It is an arithmetic number, because the mean of its divisors is an integer number (27784928).

Almost surely, 2^161499801 is an apocalyptic number.

It is an amenable number.

161499801 is a deficient number, since it is larger than the sum of its proper divisors (60779623).

161499801 is a wasteful number, since it uses less digits than its factorization.

161499801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736591.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 161499801 is about 12708.2571975861. The cubic root of 161499801 is about 544.5745364988.

The spelling of 161499801 in words is "one hundred sixty-one million, four hundred ninety-nine thousand, eight hundred one".