16156560061 has 4 divisors (see below), whose sum is σ = 16264993500. Its totient is φ = 16048126624.

The previous prime is 16156560037. The next prime is 16156560089. The reversal of 16156560061 is 16006565161.

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 3469916836 + 12686643225 = 58906^2 + 112635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16156560061 is a prime.

It is a super-2 number, since 2×16156560061² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16156560061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16156560661) 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, 54216496 + ... + 54216793.

It is an arithmetic number, because the mean of its divisors is an integer number (4066248375).

Almost surely, 2^16156560061 is an apocalyptic number.

It is an amenable number.

16156560061 is a deficient number, since it is larger than the sum of its proper divisors (108433439).

16156560061 is a wasteful number, since it uses less digits than its factorization.

16156560061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108433438.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 16156560061 in words is "sixteen billion, one hundred fifty-six million, five hundred sixty thousand, sixty-one".