7729648061 has 2 divisors, whose sum is σ = 7729648062. Its totient is φ = 7729648060.

The previous prime is 7729647983. The next prime is 7729648067. The reversal of 7729648061 is 1608469277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6198412900 + 1531235161 = 78730^2 + 39131^2 .

It is a cyclic number.

It is not a de Polignac number, because 7729648061 - 2²⁶ = 7662539197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7729648067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3864824030 + 3864824031.

It is an arithmetic number, because the mean of its divisors is an integer number (3864824031).

Almost surely, 2^7729648061 is an apocalyptic number.

It is an amenable number.

7729648061 is a deficient number, since it is larger than the sum of its proper divisors (1).

7729648061 is an equidigital number, since it uses as much as digits as its factorization.

7729648061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 7729648061 is about 87918.4170751498. The cubic root of 7729648061 is about 1977.2120116799.

The spelling of 7729648061 in words is "seven billion, seven hundred twenty-nine million, six hundred forty-eight thousand, sixty-one".