76824839521 has 2 divisors, whose sum is σ = 76824839522. Its totient is φ = 76824839520.

The previous prime is 76824839501. The next prime is 76824839537. The reversal of 76824839521 is 12593842867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65607699600 + 11217139921 = 256140^2 + 105911^2 .

It is a cyclic number.

It is not a de Polignac number, because 76824839521 - 2⁷ = 76824839393 is a prime.

It is not a weakly prime, because it can be changed into another prime (76824839501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38412419760 + 38412419761.

It is an arithmetic number, because the mean of its divisors is an integer number (38412419761).

Almost surely, 2^76824839521 is an apocalyptic number.

It is an amenable number.

76824839521 is a deficient number, since it is larger than the sum of its proper divisors (1).

76824839521 is an equidigital number, since it uses as much as digits as its factorization.

76824839521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 55.

The spelling of 76824839521 in words is "seventy-six billion, eight hundred twenty-four million, eight hundred thirty-nine thousand, five hundred twenty-one".