6399269784 has 48 divisors (see below), whose sum is σ = 17779015800. Its totient is φ = 2132698032.

The previous prime is 6399269753. The next prime is 6399269797. The reversal of 6399269784 is 4879629936.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1172967 + ... + 1178409.

Almost surely, 2^6399269784 is an apocalyptic number.

It is an amenable number.

6399269784 is an abundant number, since it is smaller than the sum of its proper divisors (11379746016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6399269784 is an frugal number, since it uses more digits than its factorization.

6399269784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10901 (or 5448 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 63.

The square root of 6399269784 is about 79995.4360198130. The cubic root of 6399269784 is about 1856.5649190421.

The spelling of 6399269784 in words is "six billion, three hundred ninety-nine million, two hundred sixty-nine thousand, seven hundred eighty-four".