7721450771 has 2 divisors, whose sum is σ = 7721450772. Its totient is φ = 7721450770.

The previous prime is 7721450753. The next prime is 7721450801. The reversal of 7721450771 is 1770541277.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7721450771 is a prime.

It is not a weakly prime, because it can be changed into another prime (7721450731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860725385 + 3860725386.

It is an arithmetic number, because the mean of its divisors is an integer number (3860725386).

Almost surely, 2^7721450771 is an apocalyptic number.

7721450771 is a deficient number, since it is larger than the sum of its proper divisors (1).

7721450771 is an equidigital number, since it uses as much as digits as its factorization.

7721450771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96040, while the sum is 41.

The square root of 7721450771 is about 87871.7859782080. The cubic root of 7721450771 is about 1976.5128201622.

The spelling of 7721450771 in words is "seven billion, seven hundred twenty-one million, four hundred fifty thousand, seven hundred seventy-one".