7799972022649 has 3 divisors (see below), whose sum is σ = 7799974815493. Its totient is φ = 7799969229806.

The previous prime is 7799972022617. The next prime is 7799972022659. The reversal of 7799972022649 is 9462202799977.

The square root of 7799972022649 is 2792843.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 7799972022649 - 2⁵ = 7799972022617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7799972022659) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1396422 + ... + 4189264.

Almost surely, 2^{7799972022649} is an apocalyptic number.

7799972022649 is the 2792843-rd square number.

7799972022649 is the 1396422-nd centered octagonal number.

It is an amenable number.

7799972022649 is a deficient number, since it is larger than the sum of its proper divisors (2792844).

7799972022649 is an frugal number, since it uses more digits than its factorization.

7799972022649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5585686 (or 2792843 counting only the distinct ones).

The product of its (nonzero) digits is 432081216, while the sum is 73.

The spelling of 7799972022649 in words is "seven trillion, seven hundred ninety-nine billion, nine hundred seventy-two million, twenty-two thousand, six hundred forty-nine".