161585464 has 8 divisors (see below), whose sum is σ = 302972760. Its totient is φ = 80792728.

The previous prime is 161585453. The next prime is 161585467. The reversal of 161585464 is 464585161.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×161585464² = 52219724352190592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161585467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10099084 + ... + 10099099.

It is an arithmetic number, because the mean of its divisors is an integer number (37871595).

Almost surely, 2^161585464 is an apocalyptic number.

It is an amenable number.

161585464 is a deficient number, since it is larger than the sum of its proper divisors (141387296).

161585464 is a wasteful number, since it uses less digits than its factorization.

161585464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20198189 (or 20198185 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 161585464 is about 12711.6271185085. The cubic root of 161585464 is about 544.6708041982.

The spelling of 161585464 in words is "one hundred sixty-one million, five hundred eighty-five thousand, four hundred sixty-four".