6439799354 has 8 divisors (see below), whose sum is σ = 9672879540. Its totient is φ = 3215506176.

The previous prime is 6439799351. The next prime is 6439799381. The reversal of 6439799354 is 4539979346.

It can be written as a sum of positive squares in 2 ways, for example, as 4885311025 + 1554488329 = 69895^2 + 39427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6439799293 and 6439799302.

It is not an unprimeable number, because it can be changed into a prime (6439799351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2194919 + ... + 2197850.

Almost surely, 2^6439799354 is an apocalyptic number.

6439799354 is a deficient number, since it is larger than the sum of its proper divisors (3233080186).

6439799354 is a wasteful number, since it uses less digits than its factorization.

6439799354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393504.

The product of its digits is 22044960, while the sum is 59.

The square root of 6439799354 is about 80248.3604443106. The cubic root of 6439799354 is about 1860.4761714925.

The spelling of 6439799354 in words is "six billion, four hundred thirty-nine million, seven hundred ninety-nine thousand, three hundred fifty-four".