6410879989 has 2 divisors, whose sum is σ = 6410879990. Its totient is φ = 6410879988.

The previous prime is 6410879971. The next prime is 6410880023. The reversal of 6410879989 is 9899780146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5322869764 + 1088010225 = 72958^2 + 32985^2 .

It is a cyclic number.

It is not a de Polignac number, because 6410879989 - 2¹⁵ = 6410847221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6410879939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205439994 + 3205439995.

It is an arithmetic number, because the mean of its divisors is an integer number (3205439995).

Almost surely, 2^6410879989 is an apocalyptic number.

It is an amenable number.

6410879989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6410879989 is an equidigital number, since it uses as much as digits as its factorization.

6410879989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The square root of 6410879989 is about 80067.9710558473. The cubic root of 6410879989 is about 1857.6870302277.

The spelling of 6410879989 in words is "six billion, four hundred ten million, eight hundred seventy-nine thousand, nine hundred eighty-nine".