16953567066545 has 4 divisors (see below), whose sum is σ = 20344280479860. Its totient is φ = 13562853653232.

The previous prime is 16953567066539. The next prime is 16953567066589. The reversal of 16953567066545 is 54566076535961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10991028433984 + 5962538632561 = 3315272^2 + 2441831^2 .

It is a cyclic number.

It is not a de Polignac number, because 16953567066545 - 2³⁰ = 16952493324721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1695356706650 + ... + 1695356706659.

It is an arithmetic number, because the mean of its divisors is an integer number (5086070119965).

Almost surely, 2^{16953567066545} is an apocalyptic number.

It is an amenable number.

16953567066545 is a deficient number, since it is larger than the sum of its proper divisors (3390713413315).

16953567066545 is an equidigital number, since it uses as much as digits as its factorization.

16953567066545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390713413314.

The product of its (nonzero) digits is 612360000, while the sum is 68.

The spelling of 16953567066545 in words is "sixteen trillion, nine hundred fifty-three billion, five hundred sixty-seven million, sixty-six thousand, five hundred forty-five".