76534307021 has 8 divisors (see below), whose sum is σ = 76765635384. Its totient is φ = 76303180800.

The previous prime is 76534307009. The next prime is 76534307023. The reversal of 76534307021 is 12070343567.

It can be written as a sum of positive squares in 4 ways, for example, as 18508242025 + 58026064996 = 136045^2 + 240886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76534307021 - 2¹⁰ = 76534305997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76534307023) 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 in 7 ways as a sum of consecutive naturals, for example, 725765 + ... + 824501.

It is an arithmetic number, because the mean of its divisors is an integer number (9595704423).

Almost surely, 2^76534307021 is an apocalyptic number.

It is an amenable number.

76534307021 is a deficient number, since it is larger than the sum of its proper divisors (231328363).

76534307021 is a wasteful number, since it uses less digits than its factorization.

76534307021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101071.

The product of its (nonzero) digits is 105840, while the sum is 38.

The spelling of 76534307021 in words is "seventy-six billion, five hundred thirty-four million, three hundred seven thousand, twenty-one".