86556812773 has 4 divisors (see below), whose sum is σ = 86625564480. Its totient is φ = 86488061068.

The previous prime is 86556812753. The next prime is 86556812779. The reversal of 86556812773 is 37721865568.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-86556812773 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86556812779) 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, 34373965 + ... + 34376482.

It is an arithmetic number, because the mean of its divisors is an integer number (21656391120).

Almost surely, 2^86556812773 is an apocalyptic number.

It is an amenable number.

86556812773 is a deficient number, since it is larger than the sum of its proper divisors (68751707).

86556812773 is a wasteful number, since it uses less digits than its factorization.

86556812773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68751706.

The product of its digits is 16934400, while the sum is 58.

The spelling of 86556812773 in words is "eighty-six billion, five hundred fifty-six million, eight hundred twelve thousand, seven hundred seventy-three".