7743672649 has 2 divisors, whose sum is σ = 7743672650. Its totient is φ = 7743672648.

The previous prime is 7743672647. The next prime is 7743672679. The reversal of 7743672649 is 9462763477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7424407225 + 319265424 = 86165^2 + 17868^2 .

It is a cyclic number.

It is not a de Polignac number, because 7743672649 - 2¹ = 7743672647 is a prime.

Together with 7743672647, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7743672649.

It is not a weakly prime, because it can be changed into another prime (7743672647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3871836324 + 3871836325.

It is an arithmetic number, because the mean of its divisors is an integer number (3871836325).

Almost surely, 2^7743672649 is an apocalyptic number.

It is an amenable number.

7743672649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7743672649 is an equidigital number, since it uses as much as digits as its factorization.

7743672649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10668672, while the sum is 55.

The square root of 7743672649 is about 87998.1400314802. The cubic root of 7743672649 is about 1978.4070997257.

The spelling of 7743672649 in words is "seven billion, seven hundred forty-three million, six hundred seventy-two thousand, six hundred forty-nine".