6378490109 has 2 divisors, whose sum is σ = 6378490110. Its totient is φ = 6378490108.

The previous prime is 6378490103. The next prime is 6378490127. The reversal of 6378490109 is 9010948736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4389062500 + 1989427609 = 66250^2 + 44603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6378490109 is a prime.

It is a super-2 number, since 2×6378490109² = 81370272141221663762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6378490103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3189245054 + 3189245055.

It is an arithmetic number, because the mean of its divisors is an integer number (3189245055).

Almost surely, 2^6378490109 is an apocalyptic number.

It is an amenable number.

6378490109 is a deficient number, since it is larger than the sum of its proper divisors (1).

6378490109 is an equidigital number, since it uses as much as digits as its factorization.

6378490109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 6378490109 is about 79865.4500331652. The cubic root of 6378490109 is about 1854.5531973888.

The spelling of 6378490109 in words is "six billion, three hundred seventy-eight million, four hundred ninety thousand, one hundred nine".