76309825021 has 4 divisors (see below), whose sum is σ = 76450878844. Its totient is φ = 76168771200.

The previous prime is 76309825013. The next prime is 76309825051. The reversal of 76309825021 is 12052890367.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17421096121 + 58888728900 = 131989^2 + 242670^2 .

It is a cyclic number.

It is not a de Polignac number, because 76309825021 - 2³ = 76309825013 is a prime.

It is a super-3 number, since 3×76309825021³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76309825051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70526100 + ... + 70527181.

It is an arithmetic number, because the mean of its divisors is an integer number (19112719711).

Almost surely, 2^76309825021 is an apocalyptic number.

It is an amenable number.

76309825021 is a deficient number, since it is larger than the sum of its proper divisors (141053823).

76309825021 is a wasteful number, since it uses less digits than its factorization.

76309825021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141053822.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 76309825021 in words is "seventy-six billion, three hundred nine million, eight hundred twenty-five thousand, twenty-one".