16545720214625 has 32 divisors (see below), whose sum is σ = 23668951278336. Its totient is φ = 11311969939200.

The previous prime is 16545720214553. The next prime is 16545720214627. The reversal of 16545720214625 is 52641202754561.

It is not a de Polignac number, because 16545720214625 - 2⁸ = 16545720214369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16545720214627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27760607 + ... + 28350356.

It is an arithmetic number, because the mean of its divisors is an integer number (739654727448).

Almost surely, 2^{16545720214625} is an apocalyptic number.

It is an amenable number.

16545720214625 is a deficient number, since it is larger than the sum of its proper divisors (7123231063711).

16545720214625 is an equidigital number, since it uses as much as digits as its factorization.

16545720214625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56111322 (or 56111312 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 50.

The spelling of 16545720214625 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty million, two hundred fourteen thousand, six hundred twenty-five".