1055615116661 has 16 divisors (see below), whose sum is σ = 1208139878400. Its totient is φ = 903521523888.

The previous prime is 1055615116657. The next prime is 1055615116663. The reversal of 1055615116661 is 1666115165501.

It is a cyclic number.

It is not a de Polignac number, because 1055615116661 - 2² = 1055615116657 is a prime.

It is a super-2 number, since 2×1055615116661² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055615116663) 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, 28071770 + ... + 28109348.

It is an arithmetic number, because the mean of its divisors is an integer number (75508742400).

Almost surely, 2^{1055615116661} is an apocalyptic number.

It is an amenable number.

1055615116661 is a deficient number, since it is larger than the sum of its proper divisors (152524761739).

1055615116661 is an equidigital number, since it uses as much as digits as its factorization.

1055615116661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43208.

The product of its (nonzero) digits is 162000, while the sum is 44.

The spelling of 1055615116661 in words is "one trillion, fifty-five billion, six hundred fifteen million, one hundred sixteen thousand, six hundred sixty-one".