16773947640 has 128 divisors (see below), whose sum is σ = 56010528000. Its totient is φ = 4465263744.

The previous prime is 16773947639. The next prime is 16773947677. The reversal of 16773947640 is 4674937761.

16773947640 is a `hidden beast` number, since 1 + 67 + 73 + 9 + 476 + 40 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 620731 + ... + 647189.

It is an arithmetic number, because the mean of its divisors is an integer number (437582250).

Almost surely, 2^16773947640 is an apocalyptic number.

16773947640 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 16773947640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28005264000).

16773947640 is an abundant number, since it is smaller than the sum of its proper divisors (39236580360).

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

16773947640 is a wasteful number, since it uses less digits than its factorization.

16773947640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27066 (or 27056 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 54.

The spelling of 16773947640 in words is "sixteen billion, seven hundred seventy-three million, nine hundred forty-seven thousand, six hundred forty".