16345622500 has 45 divisors (see below), whose sum is σ = 35758591869. Its totient is φ = 6535692000.

The previous prime is 16345622483. The next prime is 16345622521. The reversal of 16345622500 is 522654361.

The square root of 16345622500 is 127850.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 13499186596 + 2846435904 = 116186^2 + 53352^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 6391222 + ... + 6393778.

Almost surely, 2^16345622500 is an apocalyptic number.

16345622500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16345622500 is the 127850-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16345622500

16345622500 is an abundant number, since it is smaller than the sum of its proper divisors (19412969369).

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

16345622500 is an frugal number, since it uses more digits than its factorization.

16345622500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5138 (or 2564 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 16345622500 in words is "sixteen billion, three hundred forty-five million, six hundred twenty-two thousand, five hundred".