86476194781 has 4 divisors (see below), whose sum is σ = 86505843292. Its totient is φ = 86446546272.

The previous prime is 86476194737. The next prime is 86476194797. The reversal of 86476194781 is 18749167468.

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 73351055556 + 13125139225 = 270834^2 + 114565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86476194781 is a prime.

It is a super-2 number, since 2×86476194781² (a number of 23 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 (86476194731) 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, 14819880 + ... + 14825713.

It is an arithmetic number, because the mean of its divisors is an integer number (21626460823).

Almost surely, 2^86476194781 is an apocalyptic number.

It is an amenable number.

86476194781 is a deficient number, since it is larger than the sum of its proper divisors (29648511).

86476194781 is a wasteful number, since it uses less digits than its factorization.

86476194781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29648510.

The product of its digits is 16257024, while the sum is 61.

The spelling of 86476194781 in words is "eighty-six billion, four hundred seventy-six million, one hundred ninety-four thousand, seven hundred eighty-one".