7856864327 has 4 divisors (see below), whose sum is σ = 8461238520. Its totient is φ = 7252490136.

The previous prime is 7856864321. The next prime is 7856864329. The reversal of 7856864327 is 7234686587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7234686587 = 739 ⋅9789833.

It is a cyclic number.

It is not a de Polignac number, because 7856864327 - 2⁴ = 7856864311 is a prime.

It is a super-3 number, since 3×7856864327³ (a number of 31 digits) contains 333 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 (7856864321) 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, 302187077 + ... + 302187102.

It is an arithmetic number, because the mean of its divisors is an integer number (2115309630).

Almost surely, 2^7856864327 is an apocalyptic number.

7856864327 is a deficient number, since it is larger than the sum of its proper divisors (604374193).

7856864327 is a wasteful number, since it uses less digits than its factorization.

7856864327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604374192.

The product of its digits is 13547520, while the sum is 56.

The square root of 7856864327 is about 88638.9549069708. The cubic root of 7856864327 is about 1988.0001733236. Note that the first 3 decimals are identical.

The spelling of 7856864327 in words is "seven billion, eight hundred fifty-six million, eight hundred sixty-four thousand, three hundred twenty-seven".