162561856 has 28 divisors (see below), whose sum is σ = 324583552. Its totient is φ = 80777088.

The previous prime is 162561829. The next prime is 162561857. The reversal of 162561856 is 658165261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162561857) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2641 + ... + 18223.

Almost surely, 2^162561856 is an apocalyptic number.

162561856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

162561856 is a deficient number, since it is larger than the sum of its proper divisors (162021696).

162561856 is a wasteful number, since it uses less digits than its factorization.

162561856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15758 (or 15748 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 162561856 is about 12749.9747450730. The cubic root of 162561856 is about 545.7656729502.

The spelling of 162561856 in words is "one hundred sixty-two million, five hundred sixty-one thousand, eight hundred fifty-six".