161061655 has 16 divisors (see below), whose sum is σ = 208004544. Its totient is φ = 119278080.

The previous prime is 161061631. The next prime is 161061661. The reversal of 161061655 is 556160161.

It is not a de Polignac number, because 161061655 - 2⁵ = 161061623 is a prime.

It is a super-2 number, since 2×161061655² = 51881713422678050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10347 + ... + 20716.

It is an arithmetic number, because the mean of its divisors is an integer number (13000284).

Almost surely, 2^161061655 is an apocalyptic number.

161061655 is a deficient number, since it is larger than the sum of its proper divisors (46942889).

161061655 is a wasteful number, since it uses less digits than its factorization.

161061655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31146.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 161061655 is about 12691.0068552499. The cubic root of 161061655 is about 544.0816168903.

The spelling of 161061655 in words is "one hundred sixty-one million, sixty-one thousand, six hundred fifty-five".