161280464 has 20 divisors (see below), whose sum is σ = 313059204. Its totient is φ = 80491008.

The previous prime is 161280463. The next prime is 161280467. The reversal of 161280464 is 464082161.

161280464 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 17472400 + 143808064 = 4180^2 + 11992^2 .

It is a super-2 number, since 2×161280464² = 52022776136110592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161280464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161280463) 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, 137 + ... + 17960.

Almost surely, 2^161280464 is an apocalyptic number.

It is an amenable number.

161280464 is a deficient number, since it is larger than the sum of its proper divisors (151778740).

161280464 is a wasteful number, since it uses less digits than its factorization.

161280464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18662 (or 18656 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 161280464 is about 12699.6245613798. The cubic root of 161280464 is about 544.3278912828.

The spelling of 161280464 in words is "one hundred sixty-one million, two hundred eighty thousand, four hundred sixty-four".