161610655 has 8 divisors (see below), whose sum is σ = 197112384. Its totient is φ = 127168800.

The previous prime is 161610629. The next prime is 161610677. The reversal of 161610655 is 556016161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161610655 - 2⁵ = 161610623 is a prime.

It is a super-2 number, since 2×161610655² = 52236007619058050, 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 7 ways as a sum of consecutive naturals, for example, 264631 + ... + 265240.

It is an arithmetic number, because the mean of its divisors is an integer number (24639048).

Almost surely, 2^161610655 is an apocalyptic number.

161610655 is a deficient number, since it is larger than the sum of its proper divisors (35501729).

161610655 is an equidigital number, since it uses as much as digits as its factorization.

161610655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529937.

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

The square root of 161610655 is about 12712.6179443890. The cubic root of 161610655 is about 544.6991072583.

It can be divided in two parts, 1616106 and 55, that added together give a palindrome (1616161).

The spelling of 161610655 in words is "one hundred sixty-one million, six hundred ten thousand, six hundred fifty-five".