161025056 has 12 divisors (see below), whose sum is σ = 317018142. Its totient is φ = 80512512.

The previous prime is 161025043. The next prime is 161025061. The reversal of 161025056 is 650520161.

It can be written as a sum of positive squares in only one way, i.e., 113635600 + 47389456 = 10660^2 + 6884^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515985 + ... + 2516048.

Almost surely, 2^161025056 is an apocalyptic number.

161025056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161025056 is a deficient number, since it is larger than the sum of its proper divisors (155993086).

161025056 is an equidigital number, since it uses as much as digits as its factorization.

161025056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032043 (or 5032035 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 161025056 is about 12689.5648467550. The cubic root of 161025056 is about 544.0404021320.

The spelling of 161025056 in words is "one hundred sixty-one million, twenty-five thousand, fifty-six".