7841787649 has 2 divisors, whose sum is σ = 7841787650. Its totient is φ = 7841787648.

The previous prime is 7841787631. The next prime is 7841787691. The reversal of 7841787649 is 9467871487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5246394624 + 2595393025 = 72432^2 + 50945^2 .

It is a cyclic number.

It is not a de Polignac number, because 7841787649 - 2¹³ = 7841779457 is a prime.

It is a super-2 number, since 2×7841787649² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7841782649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3920893824 + 3920893825.

It is an arithmetic number, because the mean of its divisors is an integer number (3920893825).

Almost surely, 2^7841787649 is an apocalyptic number.

It is an amenable number.

7841787649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7841787649 is an equidigital number, since it uses as much as digits as its factorization.

7841787649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18966528, while the sum is 61.

The square root of 7841787649 is about 88553.8686280842. The cubic root of 7841787649 is about 1986.7277560147.

The spelling of 7841787649 in words is "seven billion, eight hundred forty-one million, seven hundred eighty-seven thousand, six hundred forty-nine".