161109735 has 16 divisors (see below), whose sum is σ = 258144864. Its totient is φ = 85802112.

The previous prime is 161109719. The next prime is 161109737. The reversal of 161109735 is 537901161.

It is a happy number.

It is not a de Polignac number, because 161109735 - 2⁴ = 161109719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161109696 and 161109705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161109737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3669 + ... + 18321.

It is an arithmetic number, because the mean of its divisors is an integer number (16134054).

Almost surely, 2^161109735 is an apocalyptic number.

161109735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161109735 is a deficient number, since it is larger than the sum of its proper divisors (97035129).

161109735 is a wasteful number, since it uses less digits than its factorization.

161109735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15394.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 161109735 is about 12692.9009686517. The cubic root of 161109735 is about 544.1357511111.

The spelling of 161109735 in words is "one hundred sixty-one million, one hundred nine thousand, seven hundred thirty-five".