1155321744545 has 8 divisors (see below), whose sum is σ = 1388293093824. Its totient is φ = 922986062064.

The previous prime is 1155321744541. The next prime is 1155321744569. The reversal of 1155321744545 is 5454471235511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1155321744545 - 2² = 1155321744541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155321744545.

It is not an unprimeable number, because it can be changed into a prime (1155321744541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158912699 + ... + 158919968.

It is an arithmetic number, because the mean of its divisors is an integer number (173536636728).

Almost surely, 2^{1155321744545} is an apocalyptic number.

It is an amenable number.

1155321744545 is a deficient number, since it is larger than the sum of its proper divisors (232971349279).

1155321744545 is an equidigital number, since it uses as much as digits as its factorization.

1155321744545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317833399.

The product of its digits is 1680000, while the sum is 47.

The spelling of 1155321744545 in words is "one trillion, one hundred fifty-five billion, three hundred twenty-one million, seven hundred forty-four thousand, five hundred forty-five".