1355145136645 has 4 divisors (see below), whose sum is σ = 1626174163980. Its totient is φ = 1084116109312.

The previous prime is 1355145136627. The next prime is 1355145136673. The reversal of 1355145136645 is 5466315415531.

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 985735236964 + 369409899681 = 992842^2 + 607791^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355145136645 - 2²⁷ = 1355010918917 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 135514513660 + ... + 135514513669.

It is an arithmetic number, because the mean of its divisors is an integer number (406543540995).

Almost surely, 2^{1355145136645} is an apocalyptic number.

It is an amenable number.

1355145136645 is a deficient number, since it is larger than the sum of its proper divisors (271029027335).

1355145136645 is an equidigital number, since it uses as much as digits as its factorization.

1355145136645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271029027334.

The product of its digits is 3240000, while the sum is 49.

The spelling of 1355145136645 in words is "one trillion, three hundred fifty-five billion, one hundred forty-five million, one hundred thirty-six thousand, six hundred forty-five".