161499745 has 32 divisors (see below), whose sum is σ = 228147840. Its totient is φ = 108426240.

The previous prime is 161499733. The next prime is 161499749. The reversal of 161499745 is 547994161.

It is not a de Polignac number, because 161499745 - 2¹³ = 161491553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161499695 and 161499704.

It is not an unprimeable number, because it can be changed into a prime (161499749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47926 + ... + 51184.

It is an arithmetic number, because the mean of its divisors is an integer number (7129620).

Almost surely, 2^161499745 is an apocalyptic number.

It is an amenable number.

161499745 is a deficient number, since it is larger than the sum of its proper divisors (66648095).

161499745 is a wasteful number, since it uses less digits than its factorization.

161499745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345.

The product of its digits is 272160, while the sum is 46.

The square root of 161499745 is about 12708.2549942941. The cubic root of 161499745 is about 544.5744735551.

The spelling of 161499745 in words is "one hundred sixty-one million, four hundred ninety-nine thousand, seven hundred forty-five".