16620720109910 has 96 divisors (see below), whose sum is σ = 38037589901568. Its totient is φ = 5190314250240.

The previous prime is 16620720109843. The next prime is 16620720109919. The reversal of 16620720109910 is 1990102702661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16620720109919) 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 47 ways as a sum of consecutive naturals, for example, 31923779 + ... + 32440238.

It is an arithmetic number, because the mean of its divisors is an integer number (396224894808).

Almost surely, 2^{16620720109910} is an apocalyptic number.

16620720109910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16620720109910 is an abundant number, since it is smaller than the sum of its proper divisors (21416869791658).

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

16620720109910 is a wasteful number, since it uses less digits than its factorization.

16620720109910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64364086 (or 64364079 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 16620720109910 in words is "sixteen trillion, six hundred twenty billion, seven hundred twenty million, one hundred nine thousand, nine hundred ten".