76207504721 has 2 divisors, whose sum is σ = 76207504722. Its totient is φ = 76207504720.

The previous prime is 76207504697. The next prime is 76207504729. The reversal of 76207504721 is 12740570267.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76120810000 + 86694721 = 275900^2 + 9311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76207504721 is a prime.

It is not a weakly prime, because it can be changed into another prime (76207504729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38103752360 + 38103752361.

It is an arithmetic number, because the mean of its divisors is an integer number (38103752361).

Almost surely, 2^76207504721 is an apocalyptic number.

It is an amenable number.

76207504721 is a deficient number, since it is larger than the sum of its proper divisors (1).

76207504721 is an equidigital number, since it uses as much as digits as its factorization.

76207504721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 164640, while the sum is 41.

The spelling of 76207504721 in words is "seventy-six billion, two hundred seven million, five hundred four thousand, seven hundred twenty-one".