4999776521 has 2 divisors, whose sum is σ = 4999776522. Its totient is φ = 4999776520.

The previous prime is 4999776479. The next prime is 4999776541. The reversal of 4999776521 is 1256779994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4993400896 + 6375625 = 70664^2 + 2525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4999776521 is a prime.

It is not a weakly prime, because it can be changed into another prime (4999776541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499888260 + 2499888261.

It is an arithmetic number, because the mean of its divisors is an integer number (2499888261).

Almost surely, 2^4999776521 is an apocalyptic number.

It is an amenable number.

4999776521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4999776521 is an equidigital number, since it uses as much as digits as its factorization.

4999776521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 59.

The square root of 4999776521 is about 70709.0978658334. The cubic root of 4999776521 is about 1709.9504700495.

The spelling of 4999776521 in words is "four billion, nine hundred ninety-nine million, seven hundred seventy-six thousand, five hundred twenty-one".