86570468421581 has 4 divisors (see below), whose sum is σ = 86573256461664. Its totient is φ = 86567680381500.

The previous prime is 86570468421517. The next prime is 86570468421607. The reversal of 86570468421581 is 18512486407568.

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 86570468421581 - 2⁶ = 86570468421517 is a prime.

It is a super-2 number, since 2×86570468421581² (a number of 29 digits) contains 22 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 (86570468420581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1393973465 + ... + 1394035566.

It is an arithmetic number, because the mean of its divisors is an integer number (21643314115416).

Almost surely, 2^{86570468421581} is an apocalyptic number.

It is an amenable number.

86570468421581 is a deficient number, since it is larger than the sum of its proper divisors (2788040083).

86570468421581 is a wasteful number, since it uses less digits than its factorization.

86570468421581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788040082.

The product of its (nonzero) digits is 103219200, while the sum is 65.

The spelling of 86570468421581 in words is "eighty-six trillion, five hundred seventy billion, four hundred sixty-eight million, four hundred twenty-one thousand, five hundred eighty-one".