161635460 has 24 divisors (see below), whose sum is σ = 387925440. Its totient is φ = 55417824.

The previous prime is 161635433. The next prime is 161635483. The reversal of 161635460 is 64536161.

It is a super-2 number, since 2×161635460² = 52252043858823200, 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 7 ways as a sum of consecutive naturals, for example, 577130 + ... + 577409.

It is an arithmetic number, because the mean of its divisors is an integer number (16163560).

Almost surely, 2^161635460 is an apocalyptic number.

161635460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161635460 is an abundant number, since it is smaller than the sum of its proper divisors (226289980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161635460 is a wasteful number, since it uses less digits than its factorization.

161635460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154555 (or 1154553 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 161635460 is about 12713.5935124574. The cubic root of 161635460 is about 544.7269737587.

The spelling of 161635460 in words is "one hundred sixty-one million, six hundred thirty-five thousand, four hundred sixty".