7720961159 has 2 divisors, whose sum is σ = 7720961160. Its totient is φ = 7720961158.

The previous prime is 7720961141. The next prime is 7720961167. The reversal of 7720961159 is 9511690277.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7720961159 - 2²⁰ = 7719912583 is a prime.

It is a super-2 number, since 2×7720961159² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7720961359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860480579 + 3860480580.

It is an arithmetic number, because the mean of its divisors is an integer number (3860480580).

Almost surely, 2^7720961159 is an apocalyptic number.

7720961159 is a deficient number, since it is larger than the sum of its proper divisors (1).

7720961159 is an equidigital number, since it uses as much as digits as its factorization.

7720961159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 47.

The square root of 7720961159 is about 87868.9999886194. Note that the first 4 decimals coincide. The cubic root of 7720961159 is about 1976.4710428296.

The spelling of 7720961159 in words is "seven billion, seven hundred twenty million, nine hundred sixty-one thousand, one hundred fifty-nine".