16545665522057 has 4 divisors (see below), whose sum is σ = 18909332025216. Its totient is φ = 14181999018900.

The previous prime is 16545665522053. The next prime is 16545665522107. The reversal of 16545665522057 is 75022556654561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16545665522057 - 2² = 16545665522053 is a prime.

It is a super-2 number, since 2×16545665522057² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16545665521987 and 16545665522005.

It is not an unprimeable number, because it can be changed into a prime (16545665522053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181833251569 + ... + 1181833251582.

It is an arithmetic number, because the mean of its divisors is an integer number (4727333006304).

Almost surely, 2^{16545665522057} is an apocalyptic number.

It is an amenable number.

16545665522057 is a deficient number, since it is larger than the sum of its proper divisors (2363666503159).

16545665522057 is an equidigital number, since it uses as much as digits as its factorization.

16545665522057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363666503158.

The product of its (nonzero) digits is 75600000, while the sum is 59.

The spelling of 16545665522057 in words is "sixteen trillion, five hundred forty-five billion, six hundred sixty-five million, five hundred twenty-two thousand, fifty-seven".