1155361744321 has 16 divisors (see below), whose sum is σ = 1258237800000. Its totient is φ = 1056700282176.

The previous prime is 1155361744307. The next prime is 1155361744349. The reversal of 1155361744321 is 1234471635511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1155361744321 - 2¹⁹ = 1155361220033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155361744921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5460735 + ... + 5668363.

It is an arithmetic number, because the mean of its divisors is an integer number (78639862500).

Almost surely, 2^{1155361744321} is an apocalyptic number.

It is an amenable number.

1155361744321 is a deficient number, since it is larger than the sum of its proper divisors (102876055679).

1155361744321 is a wasteful number, since it uses less digits than its factorization.

1155361744321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217776.

The product of its digits is 302400, while the sum is 43.

The spelling of 1155361744321 in words is "one trillion, one hundred fifty-five billion, three hundred sixty-one million, seven hundred forty-four thousand, three hundred twenty-one".