16156130665 has 4 divisors (see below), whose sum is σ = 19387356804. Its totient is φ = 12924904528.

The previous prime is 16156130663. The next prime is 16156130671. The reversal of 16156130665 is 56603165161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56603165161 = 47 ⋅1204322663.

It can be written as a sum of positive squares in 2 ways, for example, as 2036987689 + 14119142976 = 45133^2 + 118824^2 .

It is a cyclic number.

It is not a de Polignac number, because 16156130665 - 2¹ = 16156130663 is a prime.

It is a super-2 number, since 2×16156130665² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16156130663) 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, 1615613062 + ... + 1615613071.

It is an arithmetic number, because the mean of its divisors is an integer number (4846839201).

Almost surely, 2^16156130665 is an apocalyptic number.

It is an amenable number.

16156130665 is a deficient number, since it is larger than the sum of its proper divisors (3231226139).

16156130665 is an equidigital number, since it uses as much as digits as its factorization.

16156130665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3231226138.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 16156130665 in words is "sixteen billion, one hundred fifty-six million, one hundred thirty thousand, six hundred sixty-five".