7739042681 has 2 divisors, whose sum is σ = 7739042682. Its totient is φ = 7739042680.

The previous prime is 7739042657. The next prime is 7739042693. The reversal of 7739042681 is 1862409377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6640783081 + 1098259600 = 81491^2 + 33140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7739042681 is a prime.

It is a super-2 number, since 2×7739042681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7739042981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3869521340 + 3869521341.

It is an arithmetic number, because the mean of its divisors is an integer number (3869521341).

Almost surely, 2^7739042681 is an apocalyptic number.

It is an amenable number.

7739042681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7739042681 is an equidigital number, since it uses as much as digits as its factorization.

7739042681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 7739042681 is about 87971.8289056218. The cubic root of 7739042681 is about 1978.0127223557.

The spelling of 7739042681 in words is "seven billion, seven hundred thirty-nine million, forty-two thousand, six hundred eighty-one".