161061656 has 32 divisors (see below), whose sum is σ = 345565440. Its totient is φ = 68939808.

The previous prime is 161061631. The next prime is 161061661. The reversal of 161061656 is 656160161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65261 + ... + 67683.

It is an arithmetic number, because the mean of its divisors is an integer number (10798920).

Almost surely, 2^161061656 is an apocalyptic number.

It is an amenable number.

161061656 is an abundant number, since it is smaller than the sum of its proper divisors (184503784).

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

161061656 is a wasteful number, since it uses less digits than its factorization.

161061656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623 (or 3619 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 161061656 is about 12691.0068946479. The cubic root of 161061656 is about 544.0816180164.

The spelling of 161061656 in words is "one hundred sixty-one million, sixty-one thousand, six hundred fifty-six".