161655635 has 8 divisors (see below), whose sum is σ = 205397856. Its totient is φ = 121717120.

The previous prime is 161655631. The next prime is 161655677. The reversal of 161655635 is 536556161.

161655635 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161655635 - 2² = 161655631 is a prime.

It is a super-2 number, since 2×161655635² = 52265088654506450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161655631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950831 + ... + 951000.

It is an arithmetic number, because the mean of its divisors is an integer number (25674732).

Almost surely, 2^161655635 is an apocalyptic number.

161655635 is a deficient number, since it is larger than the sum of its proper divisors (43742221).

161655635 is a wasteful number, since it uses less digits than its factorization.

161655635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901853.

The product of its digits is 81000, while the sum is 38.

The square root of 161655635 is about 12714.3869297737. The cubic root of 161655635 is about 544.7496367096.

The spelling of 161655635 in words is "one hundred sixty-one million, six hundred fifty-five thousand, six hundred thirty-five".