161100645 has 16 divisors (see below), whose sum is σ = 266076672. Its totient is φ = 83148480.

The previous prime is 161100637. The next prime is 161100673. The reversal of 161100645 is 546001161.

161100645 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 161100645 - 2³ = 161100637 is a prime.

It is a super-3 number, since 3×161100645³ (a number of 26 digits) contains 333 as substring.

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, 172762 + ... + 173691.

It is an arithmetic number, because the mean of its divisors is an integer number (16629792).

Almost surely, 2^161100645 is an apocalyptic number.

161100645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161100645 is a deficient number, since it is larger than the sum of its proper divisors (104976027).

161100645 is a wasteful number, since it uses less digits than its factorization.

161100645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346492.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 161100645 is about 12692.5428894292. The cubic root of 161100645 is about 544.1255173264.

The spelling of 161100645 in words is "one hundred sixty-one million, one hundred thousand, six hundred forty-five".