16399753344 has 512 divisors, whose sum is σ = 55417824000. Its totient is φ = 4737761280.

The previous prime is 16399753333. The next prime is 16399753351. The reversal of 16399753344 is 44335799361.

16399753344 is a `hidden beast` number, since 1 + 63 + 9 + 9 + 7 + 533 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53419239 + ... + 53419545.

Almost surely, 2^16399753344 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 16399753344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27708912000).

16399753344 is an abundant number, since it is smaller than the sum of its proper divisors (39018070656).

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

16399753344 is a wasteful number, since it uses less digits than its factorization.

16399753344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 395 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 54.

The spelling of 16399753344 in words is "sixteen billion, three hundred ninety-nine million, seven hundred fifty-three thousand, three hundred forty-four".