1150661505665 has 16 divisors (see below), whose sum is σ = 1611625600512. Its totient is φ = 772237264704.

The previous prime is 1150661505661. The next prime is 1150661505671. The reversal of 1150661505665 is 5665051660511.

It is a cyclic number.

It is not a de Polignac number, because 1150661505665 - 2² = 1150661505661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1150661505661) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 349743494 + ... + 349746783.

It is an arithmetic number, because the mean of its divisors is an integer number (100726600032).

Almost surely, 2^{1150661505665} is an apocalyptic number.

It is an amenable number.

1150661505665 is a deficient number, since it is larger than the sum of its proper divisors (460964094847).

1150661505665 is an equidigital number, since it uses as much as digits as its factorization.

1150661505665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699490336.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 1150661505665 in words is "one trillion, one hundred fifty billion, six hundred sixty-one million, five hundred five thousand, six hundred sixty-five".