399650326647 has 16 divisors (see below), whose sum is σ = 626025687168. Its totient is φ = 223580602080.

The previous prime is 399650326643. The next prime is 399650326679. The reversal of 399650326647 is 746623056993.

It is not a de Polignac number, because 399650326647 - 2² = 399650326643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399650326643) 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, 465792493 + ... + 465793350.

It is an arithmetic number, because the mean of its divisors is an integer number (39126605448).

Almost surely, 2^399650326647 is an apocalyptic number.

399650326647 is a deficient number, since it is larger than the sum of its proper divisors (226375360521).

399650326647 is a wasteful number, since it uses less digits than its factorization.

399650326647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931585870.

The product of its (nonzero) digits is 44089920, while the sum is 60.

The spelling of 399650326647 in words is "three hundred ninety-nine billion, six hundred fifty million, three hundred twenty-six thousand, six hundred forty-seven".