864421786627 has 4 divisors (see below), whose sum is σ = 987910613296. Its totient is φ = 740932959960.

The previous prime is 864421786619. The next prime is 864421786639. The reversal of 864421786627 is 726687124468.

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

It is a cyclic number.

It is not a de Polignac number, because 864421786627 - 2³ = 864421786619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864421786427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61744413324 + ... + 61744413337.

It is an arithmetic number, because the mean of its divisors is an integer number (246977653324).

Almost surely, 2^864421786627 is an apocalyptic number.

864421786627 is a deficient number, since it is larger than the sum of its proper divisors (123488826669).

864421786627 is a wasteful number, since it uses less digits than its factorization.

864421786627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123488826668.

The product of its digits is 43352064, while the sum is 61.

The spelling of 864421786627 in words is "eight hundred sixty-four billion, four hundred twenty-one million, seven hundred eighty-six thousand, six hundred twenty-seven".