8521793275621 has 4 divisors (see below), whose sum is σ = 8970308711200. Its totient is φ = 8073277840044.

The previous prime is 8521793275591. The next prime is 8521793275657. The reversal of 8521793275621 is 1265723971258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8521793275621 - 2⁷ = 8521793275493 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 (8521793275661) 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 3 ways as a sum of consecutive naturals, for example, 224257717761 + ... + 224257717798.

It is an arithmetic number, because the mean of its divisors is an integer number (2242577177800).

Almost surely, 2^{8521793275621} is an apocalyptic number.

It is an amenable number.

8521793275621 is a deficient number, since it is larger than the sum of its proper divisors (448515435579).

8521793275621 is a wasteful number, since it uses less digits than its factorization.

8521793275621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448515435578.

The product of its digits is 12700800, while the sum is 58.

The spelling of 8521793275621 in words is "eight trillion, five hundred twenty-one billion, seven hundred ninety-three million, two hundred seventy-five thousand, six hundred twenty-one".