1165544440545 has 32 divisors (see below), whose sum is σ = 1932177744000. Its totient is φ = 599254838784.

The previous prime is 1165544440481. The next prime is 1165544440559. The reversal of 1165544440545 is 5450444455611.

It is not a de Polignac number, because 1165544440545 - 2⁶ = 1165544440481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1165544440494 and 1165544440503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1803820 + ... + 2363229.

It is an arithmetic number, because the mean of its divisors is an integer number (60380554500).

Almost surely, 2^{1165544440545} is an apocalyptic number.

1165544440545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1165544440545 is a deficient number, since it is larger than the sum of its proper divisors (766633303455).

1165544440545 is a wasteful number, since it uses less digits than its factorization.

1165544440545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167729.

The product of its (nonzero) digits is 3840000, while the sum is 48.

The spelling of 1165544440545 in words is "one trillion, one hundred sixty-five billion, five hundred forty-four million, four hundred forty thousand, five hundred forty-five".