16632681780 has 384 divisors, whose sum is σ = 56787365376. Its totient is φ = 3613040640.

The previous prime is 16632681763. The next prime is 16632681787. The reversal of 16632681780 is 8718623661.

It is a super-2 number, since 2×16632681780² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16632681787) 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 127 ways as a sum of consecutive naturals, for example, 38412444 + ... + 38412876.

It is an arithmetic number, because the mean of its divisors is an integer number (147883764).

Almost surely, 2^16632681780 is an apocalyptic number.

16632681780 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 16632681780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28393682688).

16632681780 is an abundant number, since it is smaller than the sum of its proper divisors (40154683596).

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

16632681780 is a wasteful number, since it uses less digits than its factorization.

16632681780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 16632681780 in words is "sixteen billion, six hundred thirty-two million, six hundred eighty-one thousand, seven hundred eighty".