6401928679 has 2 divisors, whose sum is σ = 6401928680. Its totient is φ = 6401928678.

The previous prime is 6401928653. The next prime is 6401928713. The reversal of 6401928679 is 9768291046.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6401928679 - 2¹⁵ = 6401895911 is a prime.

It is a super-2 number, since 2×6401928679² = 81969381622005370082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6401925679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200964339 + 3200964340.

It is an arithmetic number, because the mean of its divisors is an integer number (3200964340).

Almost surely, 2^6401928679 is an apocalyptic number.

6401928679 is a deficient number, since it is larger than the sum of its proper divisors (1).

6401928679 is an equidigital number, since it uses as much as digits as its factorization.

6401928679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 6401928679 is about 80012.0533357319. The cubic root of 6401928679 is about 1856.8220175243.

The spelling of 6401928679 in words is "six billion, four hundred one million, nine hundred twenty-eight thousand, six hundred seventy-nine".