6399690471 has 16 divisors (see below), whose sum is σ = 9513393120. Its totient is φ = 4251893760.

The previous prime is 6399690467. The next prime is 6399690491. The reversal of 6399690471 is 1740969936.

It is not a de Polignac number, because 6399690471 - 2² = 6399690467 is a prime.

It is a super-3 number, since 3×6399690471³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399690491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396570 + ... + 412391.

It is an arithmetic number, because the mean of its divisors is an integer number (594587070).

Almost surely, 2^6399690471 is an apocalyptic number.

6399690471 is a deficient number, since it is larger than the sum of its proper divisors (3113702649).

6399690471 is a wasteful number, since it uses less digits than its factorization.

6399690471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809263 (or 809257 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 6399690471 is about 79998.0654203588. The cubic root of 6399690471 is about 1856.6056015803.

The spelling of 6399690471 in words is "six billion, three hundred ninety-nine million, six hundred ninety thousand, four hundred seventy-one".