16720562628 has 648 divisors, whose sum is σ = 59023910400. Its totient is φ = 3981700800.

The previous prime is 16720562627. The next prime is 16720562633. The reversal of 16720562628 is 82626502761.

16720562628 is a `hidden beast` number, since 1 + 6 + 7 + 20 + 562 + 62 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (16720562627) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 539372973 + ... + 539373003.

Almost surely, 2^16720562628 is an apocalyptic number.

16720562628 is a gapful number since it is divisible by the number (18) 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 16720562628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29511955200).

16720562628 is an abundant number, since it is smaller than the sum of its proper divisors (42303347772).

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

16720562628 is a wasteful number, since it uses less digits than its factorization.

16720562628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 16720562628 in words is "sixteen billion, seven hundred twenty million, five hundred sixty-two thousand, six hundred twenty-eight".