1150561605509 has 16 divisors (see below), whose sum is σ = 1196093713920. Its totient is φ = 1105424349120.

The previous prime is 1150561605481. The next prime is 1150561605539. The reversal of 1150561605509 is 9055061650511.

It is a cyclic number.

It is not a de Polignac number, because 1150561605509 - 2⁸ = 1150561605253 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 1150561605509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1150561605539) 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, 15295739 + ... + 15370775.

It is an arithmetic number, because the mean of its divisors is an integer number (74755857120).

Almost surely, 2^{1150561605509} is an apocalyptic number.

It is an amenable number.

1150561605509 is a deficient number, since it is larger than the sum of its proper divisors (45532108411).

1150561605509 is a wasteful number, since it uses less digits than its factorization.

1150561605509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77660.

The product of its (nonzero) digits is 202500, while the sum is 44.

The spelling of 1150561605509 in words is "one trillion, one hundred fifty billion, five hundred sixty-one million, six hundred five thousand, five hundred nine".