6390494859 has 8 divisors (see below), whose sum is σ = 9737896960. Its totient is φ = 3651711336.

The previous prime is 6390494813. The next prime is 6390494867. The reversal of 6390494859 is 9584940936.

It is a happy number.

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

It is not a de Polignac number, because 6390494859 - 2⁹ = 6390494347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6390494799 and 6390494808.

It is not an unprimeable number, because it can be changed into a prime (6390494879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152154619 + ... + 152154660.

It is an arithmetic number, because the mean of its divisors is an integer number (1217237120).

Almost surely, 2^6390494859 is an apocalyptic number.

6390494859 is a deficient number, since it is larger than the sum of its proper divisors (3347402101).

6390494859 is a wasteful number, since it uses less digits than its factorization.

6390494859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304309289.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The square root of 6390494859 is about 79940.5707948098. The cubic root of 6390494859 is about 1855.7159331144.

The spelling of 6390494859 in words is "six billion, three hundred ninety million, four hundred ninety-four thousand, eight hundred fifty-nine".