16605605620 has 24 divisors (see below), whose sum is σ = 35392248864. Its totient is φ = 6543103776.

The previous prime is 16605605563. The next prime is 16605605629. The reversal of 16605605620 is 2650650661.

It is a super-2 number, since 2×16605605620² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16605605620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16605605629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6194782 + ... + 6197461.

It is an arithmetic number, because the mean of its divisors is an integer number (1474677036).

Almost surely, 2^16605605620 is an apocalyptic number.

16605605620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16605605620 is an abundant number, since it is smaller than the sum of its proper divisors (18786643244).

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

16605605620 is a wasteful number, since it uses less digits than its factorization.

16605605620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12392319 (or 12392317 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 16605605620 in words is "sixteen billion, six hundred five million, six hundred five thousand, six hundred twenty".