6419949081 has 24 divisors (see below), whose sum is σ = 10723434624. Its totient is φ = 3386345760.

The previous prime is 6419949017. The next prime is 6419949091. The reversal of 6419949081 is 1809499146.

It is not a de Polignac number, because 6419949081 - 2⁶ = 6419949017 is a prime.

It is a super-2 number, since 2×6419949081² = 82431492405265489122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6419949091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1677825 + ... + 1681646.

It is an arithmetic number, because the mean of its divisors is an integer number (446809776).

Almost surely, 2^6419949081 is an apocalyptic number.

It is an amenable number.

6419949081 is a deficient number, since it is larger than the sum of its proper divisors (4303485543).

6419949081 is a wasteful number, since it uses less digits than its factorization.

6419949081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359501 (or 3359494 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 6419949081 is about 80124.5847477539. The cubic root of 6419949081 is about 1858.5626040672.

The spelling of 6419949081 in words is "six billion, four hundred nineteen million, nine hundred forty-nine thousand, eighty-one".