86500278781 has 8 divisors (see below), whose sum is σ = 104672606400. Its totient is φ = 69781737408.

The previous prime is 86500278773. The next prime is 86500278793. The reversal of 86500278781 is 18787200568.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86500278781 - 2³ = 86500278773 is a prime.

It is a super-2 number, since 2×86500278781² (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 (86500273781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363446431 + ... + 363446668.

It is an arithmetic number, because the mean of its divisors is an integer number (13084075800).

Almost surely, 2^86500278781 is an apocalyptic number.

It is an amenable number.

86500278781 is a deficient number, since it is larger than the sum of its proper divisors (18172327619).

86500278781 is a wasteful number, since it uses less digits than its factorization.

86500278781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726893123.

The product of its (nonzero) digits is 1505280, while the sum is 52.

The spelling of 86500278781 in words is "eighty-six billion, five hundred million, two hundred seventy-eight thousand, seven hundred eighty-one".