399650545584 has 240 divisors, whose sum is σ = 1179526901280. Its totient is φ = 126142894080.

The previous prime is 399650545537. The next prime is 399650545607. The reversal of 399650545584 is 485545056993.

399650545584 is a `hidden beast` number, since 3 + 9 + 9 + 6 + 5 + 0 + 5 + 45 + 584 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55173867 + ... + 55181109.

It is an arithmetic number, because the mean of its divisors is an integer number (4914695422).

Almost surely, 2^399650545584 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399650545584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589763450640).

399650545584 is an abundant number, since it is smaller than the sum of its proper divisors (779876355696).

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

399650545584 is a wasteful number, since it uses less digits than its factorization.

399650545584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7540 (or 7531 counting only the distinct ones).

The product of its (nonzero) digits is 116640000, while the sum is 63.

The spelling of 399650545584 in words is "three hundred ninety-nine billion, six hundred fifty million, five hundred forty-five thousand, five hundred eighty-four".