1156445342665 has 8 divisors (see below), whose sum is σ = 1387745787528. Its totient is φ = 925148689920.

The previous prime is 1156445342629. The next prime is 1156445342677. The reversal of 1156445342665 is 5662435446511.

It can be written as a sum of positive squares in 4 ways, for example, as 74321119161 + 1082124223504 = 272619^2 + 1040252^2 .

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

It is not a de Polignac number, because 1156445342665 - 2¹⁹ = 1156444818377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227302 + ... + 1537711.

It is an arithmetic number, because the mean of its divisors is an integer number (173468223441).

Almost surely, 2^{1156445342665} is an apocalyptic number.

It is an amenable number.

1156445342665 is a deficient number, since it is larger than the sum of its proper divisors (231300444863).

1156445342665 is a wasteful number, since it uses less digits than its factorization.

1156445342665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896059.

The product of its digits is 10368000, while the sum is 52.

The spelling of 1156445342665 in words is "one trillion, one hundred fifty-six billion, four hundred forty-five million, three hundred forty-two thousand, six hundred sixty-five".