16551620700 has 216 divisors, whose sum is σ = 49710818304. Its totient is φ = 4251744000.

The previous prime is 16551620669. The next prime is 16551620707. The reversal of 16551620700 is 702615561.

It is a super-2 number, since 2×16551620700² (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 (16551620707) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 78443595 + ... + 78443805.

Almost surely, 2^16551620700 is an apocalyptic number.

16551620700 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 16551620700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24855409152).

16551620700 is an abundant number, since it is smaller than the sum of its proper divisors (33159197604).

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

16551620700 is a wasteful number, since it uses less digits than its factorization.

16551620700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The spelling of 16551620700 in words is "sixteen billion, five hundred fifty-one million, six hundred twenty thousand, seven hundred".