2647971005149 has 4 divisors (see below), whose sum is σ = 2684244580636. Its totient is φ = 2611697429664.

The previous prime is 2647971005131. The next prime is 2647971005191. The reversal of 2647971005149 is 9415001797462.

2647971005149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 800255484900 + 1847715520249 = 894570^2 + 1359307^2 .

It is a cyclic number.

It is not a de Polignac number, because 2647971005149 - 2¹¹ = 2647971003101 is a prime.

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 2647971005149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2647971005549) 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, 18136787634 + ... + 18136787779.

It is an arithmetic number, because the mean of its divisors is an integer number (671061145159).

Almost surely, 2^{2647971005149} is an apocalyptic number.

It is an amenable number.

2647971005149 is a deficient number, since it is larger than the sum of its proper divisors (36273575487).

2647971005149 is an equidigital number, since it uses as much as digits as its factorization.

2647971005149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36273575486.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 2647971005149 in words is "two trillion, six hundred forty-seven billion, nine hundred seventy-one million, five thousand, one hundred forty-nine".