7742757641 has 2 divisors, whose sum is σ = 7742757642. Its totient is φ = 7742757640.

The previous prime is 7742757599. The next prime is 7742757707. The reversal of 7742757641 is 1467572477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5897625616 + 1845132025 = 76796^2 + 42955^2 .

It is a cyclic number.

It is not a de Polignac number, because 7742757641 - 2⁶ = 7742757577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7742757641.

It is not a weakly prime, because it can be changed into another prime (7742757541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3871378820 + 3871378821.

It is an arithmetic number, because the mean of its divisors is an integer number (3871378821).

Almost surely, 2^7742757641 is an apocalyptic number.

It is an amenable number.

7742757641 is a deficient number, since it is larger than the sum of its proper divisors (1).

7742757641 is an equidigital number, since it uses as much as digits as its factorization.

7742757641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304960, while the sum is 50.

The square root of 7742757641 is about 87992.9408589121. The cubic root of 7742757641 is about 1978.3291724634.

The spelling of 7742757641 in words is "seven billion, seven hundred forty-two million, seven hundred fifty-seven thousand, six hundred forty-one".