161584402 has 32 divisors (see below), whose sum is σ = 290585088. Its totient is φ = 65935296.

The previous prime is 161584393. The next prime is 161584429. The reversal of 161584402 is 204485161.

It is a super-2 number, since 2×161584402² = 52219037939395208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21028 + ... + 27664.

It is an arithmetic number, because the mean of its divisors is an integer number (9080784).

Almost surely, 2^161584402 is an apocalyptic number.

161584402 is a deficient number, since it is larger than the sum of its proper divisors (129000686).

161584402 is a wasteful number, since it uses less digits than its factorization.

161584402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6730.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 161584402 is about 12711.5853456601. The cubic root of 161584402 is about 544.6696109356.

The spelling of 161584402 in words is "one hundred sixty-one million, five hundred eighty-four thousand, four hundred two".