16107561 has 12 divisors (see below), whose sum is σ = 23547888. Its totient is φ = 10608504.

The previous prime is 16107527. The next prime is 16107563. The reversal of 16107561 is 16570161.

16107561 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16107561 - 2⁷ = 16107433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16107563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10035 + ... + 11528.

It is an arithmetic number, because the mean of its divisors is an integer number (1962324).

Almost surely, 2^16107561 is an apocalyptic number.

It is an amenable number.

16107561 is a deficient number, since it is larger than the sum of its proper divisors (7440327).

16107561 is a wasteful number, since it uses less digits than its factorization.

16107561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21652 (or 21649 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 16107561 is about 4013.4226042120. The cubic root of 16107561 is about 252.5476092300.

The spelling of 16107561 in words is "sixteen million, one hundred seven thousand, five hundred sixty-one".