399636548745336 has 384 divisors, whose sum is σ = 1338721378176000. Its totient is φ = 105134112331776.

The previous prime is 399636548745331. The next prime is 399636548745337. The reversal of 399636548745336 is 633547845636993.

399636548745336 is a `hidden beast` number, since 3 + 9 + 9 + 6 + 3 + 6 + 5 + 4 + 8 + 74 + 533 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399636548745331) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 324999060 + ... + 326226396.

It is an arithmetic number, because the mean of its divisors is an integer number (3486253589000).

Almost surely, 2^{399636548745336} is an apocalyptic number.

399636548745336 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399636548745336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669360689088000).

399636548745336 is an abundant number, since it is smaller than the sum of its proper divisors (939084829430664).

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

399636548745336 is a wasteful number, since it uses less digits than its factorization.

399636548745336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228331 (or 1228324 counting only the distinct ones).

The product of its digits is 31744742400, while the sum is 81.

The spelling of 399636548745336 in words is "three hundred ninety-nine trillion, six hundred thirty-six billion, five hundred forty-eight million, seven hundred forty-five thousand, three hundred thirty-six".