16547561145 has 32 divisors (see below), whose sum is σ = 30366858240. Its totient is φ = 8540674560.

The previous prime is 16547561137. The next prime is 16547561161. The reversal of 16547561145 is 54116574561.

16547561145 is a `hidden beast` number, since 1 + 6 + 5 + 47 + 561 + 1 + 45 = 666.

It is not a de Polignac number, because 16547561145 - 2³ = 16547561137 is a prime.

It is a super-2 number, since 2×16547561145² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 16547561145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1972824 + ... + 1981193.

It is an arithmetic number, because the mean of its divisors is an integer number (948964320).

Almost surely, 2^16547561145 is an apocalyptic number.

16547561145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16547561145 is a deficient number, since it is larger than the sum of its proper divisors (13819297095).

16547561145 is a wasteful number, since it uses less digits than its factorization.

16547561145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954062 (or 3954056 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The spelling of 16547561145 in words is "sixteen billion, five hundred forty-seven million, five hundred sixty-one thousand, one hundred forty-five".