16450055640 has 128 divisors (see below), whose sum is σ = 55007640000. Its totient is φ = 4372752384.

The previous prime is 16450055621. The next prime is 16450055647. The reversal of 16450055640 is 4655005461.

16450055640 is a `hidden beast` number, since 1 + 6 + 4 + 5 + 0 + 0 + 5 + 5 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16450055595 and 16450055604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16450055647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 318336 + ... + 366384.

Almost surely, 2^16450055640 is an apocalyptic number.

16450055640 is a gapful number since it is divisible by the number (10) 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 16450055640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27503820000).

16450055640 is an abundant number, since it is smaller than the sum of its proper divisors (38557584360).

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

16450055640 is a wasteful number, since it uses less digits than its factorization.

16450055640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48386 (or 48376 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 16450055640 in words is "sixteen billion, four hundred fifty million, fifty-five thousand, six hundred forty".