86542773500821 has 4 divisors (see below), whose sum is σ = 94410298364544. Its totient is φ = 78675248637100.

The previous prime is 86542773500809. The next prime is 86542773500849. The reversal of 86542773500821 is 12800537724568.

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 86542773500821 - 2²⁹ = 86542236629909 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 (86542773500861) 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, 3933762431845 + ... + 3933762431866.

It is an arithmetic number, because the mean of its divisors is an integer number (23602574591136).

Almost surely, 2^{86542773500821} is an apocalyptic number.

It is an amenable number.

86542773500821 is a deficient number, since it is larger than the sum of its proper divisors (7867524863723).

86542773500821 is a wasteful number, since it uses less digits than its factorization.

86542773500821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7867524863722.

The product of its (nonzero) digits is 22579200, while the sum is 58.

The spelling of 86542773500821 in words is "eighty-six trillion, five hundred forty-two billion, seven hundred seventy-three million, five hundred thousand, eight hundred twenty-one".