16105507085 has 4 divisors (see below), whose sum is σ = 19326608508. Its totient is φ = 12884405664.

The previous prime is 16105507069. The next prime is 16105507087. The reversal of 16105507085 is 58070550161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10100652004 + 6004855081 = 100502^2 + 77491^2 .

It is a cyclic number.

It is not a de Polignac number, because 16105507085 - 2⁴ = 16105507069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16105507087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610550704 + ... + 1610550713.

It is an arithmetic number, because the mean of its divisors is an integer number (4831652127).

Almost surely, 2^16105507085 is an apocalyptic number.

It is an amenable number.

16105507085 is a deficient number, since it is larger than the sum of its proper divisors (3221101423).

16105507085 is an equidigital number, since it uses as much as digits as its factorization.

16105507085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221101422.

The product of its (nonzero) digits is 42000, while the sum is 38.

The spelling of 16105507085 in words is "sixteen billion, one hundred five million, five hundred seven thousand, eighty-five".