16165656547 has 4 divisors (see below), whose sum is σ = 16165916080. Its totient is φ = 16165397016.

The previous prime is 16165656539. The next prime is 16165656571. The reversal of 16165656547 is 74565656161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(16165656547) divides (16165656547-1)³.

It is a cyclic number.

It is not a de Polignac number, because 16165656547 - 2³ = 16165656539 is a prime.

It is a super-2 number, since 2×16165656547² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a deceptive number, since it divides R_16165656546.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16165656494 and 16165656503.

It is not an unprimeable number, because it can be changed into a prime (16165656527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25954 + ... + 181672.

It is an arithmetic number, because the mean of its divisors is an integer number (4041479020).

Almost surely, 2^16165656547 is an apocalyptic number.

16165656547 is the 103813-rd pentagonal number.

16165656547 is a deficient number, since it is larger than the sum of its proper divisors (259533).

16165656547 is a wasteful number, since it uses less digits than its factorization.

16165656547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259532.

The product of its digits is 4536000, while the sum is 52.

The spelling of 16165656547 in words is "sixteen billion, one hundred sixty-five million, six hundred fifty-six thousand, five hundred forty-seven".