161549464 has 16 divisors (see below), whose sum is σ = 304913520. Its totient is φ = 80239200.

The previous prime is 161549431. The next prime is 161549467. The reversal of 161549464 is 464945161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161549467) 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, 65659 + ... + 68074.

It is an arithmetic number, because the mean of its divisors is an integer number (19057095).

Almost surely, 2^161549464 is an apocalyptic number.

It is an amenable number.

161549464 is a deficient number, since it is larger than the sum of its proper divisors (143364056).

161549464 is a wasteful number, since it uses less digits than its factorization.

161549464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133890 (or 133886 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 161549464 is about 12710.2110131972. The cubic root of 161549464 is about 544.6303517037.

The spelling of 161549464 in words is "one hundred sixty-one million, five hundred forty-nine thousand, four hundred sixty-four".