6402801919 has 4 divisors (see below), whose sum is σ = 6779437344. Its totient is φ = 6026166496.

The previous prime is 6402801913. The next prime is 6402801929. The reversal of 6402801919 is 9191082046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6402801919 - 2²¹ = 6400704767 is a prime.

It is a super-2 number, since 2×6402801919² = 81991744827900165122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402801913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188317687 + ... + 188317720.

It is an arithmetic number, because the mean of its divisors is an integer number (1694859336).

Almost surely, 2^6402801919 is an apocalyptic number.

6402801919 is a deficient number, since it is larger than the sum of its proper divisors (376635425).

6402801919 is a wasteful number, since it uses less digits than its factorization.

6402801919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376635424.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 6402801919 is about 80017.5100774824. The cubic root of 6402801919 is about 1856.9064388303.

The spelling of 6402801919 in words is "six billion, four hundred two million, eight hundred one thousand, nine hundred nineteen".