16545723552500 has 60 divisors (see below), whose sum is σ = 36188298790644. Its totient is φ = 6617171712000.

The previous prime is 16545723552469. The next prime is 16545723552503. The reversal of 16545723552500 is 525532754561.

It can be written as a sum of positive squares in 10 ways, for example, as 12461662491664 + 4084061060836 = 3530108^2 + 2020906^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16545723552503) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14326622 + ... + 15438378.

Almost surely, 2^{16545723552500} is an apocalyptic number.

16545723552500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16545723552500 is an abundant number, since it is smaller than the sum of its proper divisors (19642575238144).

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

16545723552500 is a wasteful number, since it uses less digits than its factorization.

16545723552500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117734 (or 1117717 counting only the distinct ones).

The product of its (nonzero) digits is 6300000, while the sum is 50.

The spelling of 16545723552500 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty-three million, five hundred fifty-two thousand, five hundred".