161056155 has 24 divisors (see below), whose sum is σ = 279041328. Its totient is φ = 79287936.

The previous prime is 161056121. The next prime is 161056211. The reversal of 161056155 is 551650161.

161056155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161056155 - 2¹³ = 161047963 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29232 + ... + 34301.

It is an arithmetic number, because the mean of its divisors is an integer number (11626722).

Almost surely, 2^161056155 is an apocalyptic number.

161056155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161056155 is a deficient number, since it is larger than the sum of its proper divisors (117985173).

161056155 is a wasteful number, since it uses less digits than its factorization.

161056155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63567 (or 63554 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 161056155 is about 12690.7901645248. The cubic root of 161056155 is about 544.0754236452.

The spelling of 161056155 in words is "one hundred sixty-one million, fifty-six thousand, one hundred fifty-five".