1166913545553 has 24 divisors (see below), whose sum is σ = 1926363723648. Its totient is φ = 666797268672.

The previous prime is 1166913545527. The next prime is 1166913545563. The reversal of 1166913545553 is 3555453196611.

1166913545553 is a `hidden beast` number, since 1 + 1 + 6 + 6 + 9 + 135 + 455 + 53 = 666.

It is not a de Polignac number, because 1166913545553 - 2¹⁸ = 1166913283409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1166913545553.

It is not an unprimeable number, because it can be changed into a prime (1166913545563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5833276 + ... + 6030002.

It is an arithmetic number, because the mean of its divisors is an integer number (80265155152).

Almost surely, 2^{1166913545553} is an apocalyptic number.

It is an amenable number.

1166913545553 is a deficient number, since it is larger than the sum of its proper divisors (759450178095).

1166913545553 is a wasteful number, since it uses less digits than its factorization.

1166913545553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290893 (or 290890 counting only the distinct ones).

The product of its digits is 7290000, while the sum is 54.

The spelling of 1166913545553 in words is "one trillion, one hundred sixty-six billion, nine hundred thirteen million, five hundred forty-five thousand, five hundred fifty-three".