76204366610021 has 4 divisors (see below), whose sum is σ = 82066240964652. Its totient is φ = 70342492255392.

The previous prime is 76204366610003. The next prime is 76204366610063. The reversal of 76204366610021 is 12001666340267.

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 33276907480996 + 42927459129025 = 5768614^2 + 6551905^2 .

It is a cyclic number.

It is not a de Polignac number, because 76204366610021 - 2²² = 76204362415717 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 (76204366610321) 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, 2930937177296 + ... + 2930937177321.

It is an arithmetic number, because the mean of its divisors is an integer number (20516560241163).

Almost surely, 2^{76204366610021} is an apocalyptic number.

It is an amenable number.

76204366610021 is a deficient number, since it is larger than the sum of its proper divisors (5861874354631).

76204366610021 is a wasteful number, since it uses less digits than its factorization.

76204366610021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5861874354630.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 76204366610021 in words is "seventy-six trillion, two hundred four billion, three hundred sixty-six million, six hundred ten thousand, twenty-one".