7641274777 has 2 divisors, whose sum is σ = 7641274778. Its totient is φ = 7641274776.

The previous prime is 7641274741. The next prime is 7641274799. The reversal of 7641274777 is 7774721467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7487613961 + 153660816 = 86531^2 + 12396^2 .

It is a cyclic number.

It is not a de Polignac number, because 7641274777 - 2³¹ = 5493791129 is a prime.

It is not a weakly prime, because it can be changed into another prime (7641274477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820637388 + 3820637389.

It is an arithmetic number, because the mean of its divisors is an integer number (3820637389).

Almost surely, 2^7641274777 is an apocalyptic number.

It is an amenable number.

7641274777 is a deficient number, since it is larger than the sum of its proper divisors (1).

7641274777 is an equidigital number, since it uses as much as digits as its factorization.

7641274777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3226944, while the sum is 52.

The square root of 7641274777 is about 87414.3854122421. The cubic root of 7641274777 is about 1969.6479377217.

The spelling of 7641274777 in words is "seven billion, six hundred forty-one million, two hundred seventy-four thousand, seven hundred seventy-seven".