1166551616553 has 16 divisors (see below), whose sum is σ = 1601792805120. Its totient is φ = 754620299136.

The previous prime is 1166551616551. The next prime is 1166551616591. The reversal of 1166551616553 is 3556161556611.

It is not a de Polignac number, because 1166551616553 - 2¹ = 1166551616551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1166551616496 and 1166551616505.

It is not an unprimeable number, because it can be changed into a prime (1166551616551) 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, 14277348 + ... + 14358821.

It is an arithmetic number, because the mean of its divisors is an integer number (100112050320).

Almost surely, 2^{1166551616553} is an apocalyptic number.

It is an amenable number.

1166551616553 is a deficient number, since it is larger than the sum of its proper divisors (435241188567).

1166551616553 is a wasteful number, since it uses less digits than its factorization.

1166551616553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28636576.

The product of its digits is 2430000, while the sum is 51.

The spelling of 1166551616553 in words is "one trillion, one hundred sixty-six billion, five hundred fifty-one million, six hundred sixteen thousand, five hundred fifty-three".