7774908649 has 2 divisors, whose sum is σ = 7774908650. Its totient is φ = 7774908648.

The previous prime is 7774908641. The next prime is 7774908653. The reversal of 7774908649 is 9468094777.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7225850025 + 549058624 = 85005^2 + 23432^2 .

It is a cyclic number.

It is not a de Polignac number, because 7774908649 - 2³ = 7774908641 is a prime.

It is not a weakly prime, because it can be changed into another prime (7774908641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3887454324 + 3887454325.

It is an arithmetic number, because the mean of its divisors is an integer number (3887454325).

Almost surely, 2^7774908649 is an apocalyptic number.

It is an amenable number.

7774908649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7774908649 is an equidigital number, since it uses as much as digits as its factorization.

7774908649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21337344, while the sum is 61.

The square root of 7774908649 is about 88175.4424372228. The cubic root of 7774908649 is about 1981.0636608027.

The spelling of 7774908649 in words is "seven billion, seven hundred seventy-four million, nine hundred eight thousand, six hundred forty-nine".