16115482474561 has 4 divisors (see below), whose sum is σ = 16118222742724. Its totient is φ = 16112742206400.

The previous prime is 16115482474547. The next prime is 16115482474571. The reversal of 16115482474561 is 16547428451161.

It is a happy number.

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 11284520251536 + 4830962223025 = 3359244^2 + 2197945^2 .

It is a cyclic number.

It is not a de Polignac number, because 16115482474561 - 2³⁵ = 16081122736193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16115482474571) 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, 1370125260 + ... + 1370137021.

It is an arithmetic number, because the mean of its divisors is an integer number (4029555685681).

Almost surely, 2^{16115482474561} is an apocalyptic number.

It is an amenable number.

16115482474561 is a deficient number, since it is larger than the sum of its proper divisors (2740268163).

16115482474561 is an equidigital number, since it uses as much as digits as its factorization.

16115482474561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740268162.

The product of its digits is 6451200, while the sum is 55.

The spelling of 16115482474561 in words is "sixteen trillion, one hundred fifteen billion, four hundred eighty-two million, four hundred seventy-four thousand, five hundred sixty-one".