161284641 has 16 divisors (see below), whose sum is σ = 246474624. Its totient is φ = 91897344.

The previous prime is 161284621. The next prime is 161284657. The reversal of 161284641 is 146482161.

It is not a de Polignac number, because 161284641 - 2⁹ = 161284129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161284601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3466 + ... + 18291.

It is an arithmetic number, because the mean of its divisors is an integer number (15404664).

Almost surely, 2^161284641 is an apocalyptic number.

It is an amenable number.

161284641 is a deficient number, since it is larger than the sum of its proper divisors (85189983).

161284641 is a wasteful number, since it uses less digits than its factorization.

161284641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22120.

The product of its digits is 9216, while the sum is 33.

The square root of 161284641 is about 12699.7890139955. The cubic root of 161284641 is about 544.3325904219.

The spelling of 161284641 in words is "one hundred sixty-one million, two hundred eighty-four thousand, six hundred forty-one".