1356220989161 has 4 divisors (see below), whose sum is σ = 1356347359812. Its totient is φ = 1356094618512.

The previous prime is 1356220989133. The next prime is 1356220989181. The reversal of 1356220989161 is 1619890226531.

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 472491264400 + 883729724761 = 687380^2 + 940069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1356220989161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356220989181) 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, 63169226 + ... + 63190691.

It is an arithmetic number, because the mean of its divisors is an integer number (339086839953).

Almost surely, 2^{1356220989161} is an apocalyptic number.

It is an amenable number.

1356220989161 is a deficient number, since it is larger than the sum of its proper divisors (126370651).

1356220989161 is a wasteful number, since it uses less digits than its factorization.

1356220989161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126370650.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 1356220989161 in words is "one trillion, three hundred fifty-six billion, two hundred twenty million, nine hundred eighty-nine thousand, one hundred sixty-one".