86127405491 has 4 divisors (see below), whose sum is σ = 86573661672. Its totient is φ = 85681149312.

The previous prime is 86127405451. The next prime is 86127405503. The reversal of 86127405491 is 19450472168.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86127405491 is a prime.

It is a super-2 number, since 2×86127405491² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86127405451) 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, 223127801 + ... + 223128186.

It is an arithmetic number, because the mean of its divisors is an integer number (21643415418).

Almost surely, 2^86127405491 is an apocalyptic number.

86127405491 is a deficient number, since it is larger than the sum of its proper divisors (446256181).

86127405491 is a wasteful number, since it uses less digits than its factorization.

86127405491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446256180.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 86127405491 in words is "eighty-six billion, one hundred twenty-seven million, four hundred five thousand, four hundred ninety-one".