76758265021 has 2 divisors, whose sum is σ = 76758265022. Its totient is φ = 76758265020.

The previous prime is 76758265013. The next prime is 76758265057. The reversal of 76758265021 is 12056285767.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72474562521 + 4283702500 = 269211^2 + 65450^2 .

It is a cyclic number.

It is not a de Polignac number, because 76758265021 - 2³ = 76758265013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76758265061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38379132510 + 38379132511.

It is an arithmetic number, because the mean of its divisors is an integer number (38379132511).

Almost surely, 2^76758265021 is an apocalyptic number.

It is an amenable number.

76758265021 is a deficient number, since it is larger than the sum of its proper divisors (1).

76758265021 is an equidigital number, since it uses as much as digits as its factorization.

76758265021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 76758265021 in words is "seventy-six billion, seven hundred fifty-eight million, two hundred sixty-five thousand, twenty-one".