6478315187 has 2 divisors, whose sum is σ = 6478315188. Its totient is φ = 6478315186.

The previous prime is 6478315177. The next prime is 6478315201. The reversal of 6478315187 is 7815138746.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6478315187 is a prime.

It is a super-2 number, since 2×6478315187² = 83937135324229689938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6478315127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3239157593 + 3239157594.

It is an arithmetic number, because the mean of its divisors is an integer number (3239157594).

Almost surely, 2^6478315187 is an apocalyptic number.

6478315187 is a deficient number, since it is larger than the sum of its proper divisors (1).

6478315187 is an equidigital number, since it uses as much as digits as its factorization.

6478315187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 50.

The square root of 6478315187 is about 80487.9816308000. The cubic root of 6478315187 is about 1864.1779122298.

The spelling of 6478315187 in words is "six billion, four hundred seventy-eight million, three hundred fifteen thousand, one hundred eighty-seven".