16691776425280 has 224 divisors, whose sum is σ = 43641739975680. Its totient is φ = 6030502625280.

The previous prime is 16691776425253. The next prime is 16691776425329. The reversal of 16691776425280 is 8252467719661.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is an unprimeable number.

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, 399523752 + ... + 399565528.

It is an arithmetic number, because the mean of its divisors is an integer number (194829196320).

Almost surely, 2^{16691776425280} is an apocalyptic number.

16691776425280 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 16691776425280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21820869987840).

16691776425280 is an abundant number, since it is smaller than the sum of its proper divisors (26949963550400).

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

16691776425280 is a wasteful number, since it uses less digits than its factorization.

16691776425280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42537 (or 42527 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 16691776425280 in words is "sixteen trillion, six hundred ninety-one billion, seven hundred seventy-six million, four hundred twenty-five thousand, two hundred eighty".