6878461391 has 8 divisors (see below), whose sum is σ = 7054245744. Its totient is φ = 6703058880.

The previous prime is 6878461379. The next prime is 6878461393. The reversal of 6878461391 is 1931648786.

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 6878461391 - 2¹⁰ = 6878460367 is a prime.

It is a super-2 number, since 2×6878461391² = 94626462214955309762, which 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 (6878461393) 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, 58796 + ... + 131201.

It is an arithmetic number, because the mean of its divisors is an integer number (881780718).

Almost surely, 2^6878461391 is an apocalyptic number.

6878461391 is a deficient number, since it is larger than the sum of its proper divisors (175784353).

6878461391 is a wasteful number, since it uses less digits than its factorization.

6878461391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190921.

The product of its digits is 1741824, while the sum is 53.

The square root of 6878461391 is about 82936.4901053812. The cubic root of 6878461391 is about 1901.7952921231.

The spelling of 6878461391 in words is "six billion, eight hundred seventy-eight million, four hundred sixty-one thousand, three hundred ninety-one".