2972177121647 has 4 divisors (see below), whose sum is σ = 2976369191640. Its totient is φ = 2967985051656.

The previous prime is 2972177121607. The next prime is 2972177121659. The reversal of 2972177121647 is 7461217712792.

2972177121647 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2972177121647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2972177121592 and 2972177121601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2972177121607) 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, 2096033933 + ... + 2096035350.

It is an arithmetic number, because the mean of its divisors is an integer number (744092297910).

Almost surely, 2^{2972177121647} is an apocalyptic number.

2972177121647 is a deficient number, since it is larger than the sum of its proper divisors (4192069993).

2972177121647 is an equidigital number, since it uses as much as digits as its factorization.

2972177121647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4192069992.

The product of its digits is 4148928, while the sum is 56.

The spelling of 2972177121647 in words is "two trillion, nine hundred seventy-two billion, one hundred seventy-seven million, one hundred twenty-one thousand, six hundred forty-seven".