2772120643 has 8 divisors (see below), whose sum is σ = 2869293600. Its totient is φ = 2675053248.

The previous prime is 2772120629. The next prime is 2772120671. The reversal of 2772120643 is 3460212772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2772120643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2772120599 and 2772120608.

It is not an unprimeable number, because it can be changed into a prime (2772120613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29055 + ... + 79927.

It is an arithmetic number, because the mean of its divisors is an integer number (358661700).

Almost surely, 2^2772120643 is an apocalyptic number.

2772120643 is a deficient number, since it is larger than the sum of its proper divisors (97172957).

2772120643 is a wasteful number, since it uses less digits than its factorization.

2772120643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52781.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 2772120643 is about 52650.9320240392. The cubic root of 2772120643 is about 1404.7661778290.

The spelling of 2772120643 in words is "two billion, seven hundred seventy-two million, one hundred twenty thousand, six hundred forty-three".