161502649 has 16 divisors (see below), whose sum is σ = 206269056. Its totient is φ = 122774400.

The previous prime is 161502637. The next prime is 161502673. The reversal of 161502649 is 946205161.

It is not a de Polignac number, because 161502649 - 2⁵ = 161502617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161502049) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22422 + ... + 28735.

It is an arithmetic number, because the mean of its divisors is an integer number (12891816).

Almost surely, 2^161502649 is an apocalyptic number.

It is an amenable number.

161502649 is a deficient number, since it is larger than the sum of its proper divisors (44766407).

161502649 is a wasteful number, since it uses less digits than its factorization.

161502649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51216.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 161502649 is about 12708.3692502225. The cubic root of 161502649 is about 544.5777376155.

The spelling of 161502649 in words is "one hundred sixty-one million, five hundred two thousand, six hundred forty-nine".