16381736658 has 144 divisors (see below), whose sum is σ = 42380222976. Its totient is φ = 4475243520.

The previous prime is 16381736653. The next prime is 16381736669. The reversal of 16381736658 is 85663718361.

It is a super-2 number, since 2×16381736658² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16381736653) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 46407010 + ... + 46407362.

It is an arithmetic number, because the mean of its divisors is an integer number (294307104).

Almost surely, 2^16381736658 is an apocalyptic number.

16381736658 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16381736658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21190111488).

16381736658 is an abundant number, since it is smaller than the sum of its proper divisors (25998486318).

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

16381736658 is a wasteful number, since it uses less digits than its factorization.

16381736658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 505 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 16381736658 in words is "sixteen billion, three hundred eighty-one million, seven hundred thirty-six thousand, six hundred fifty-eight".