1161156655 has 24 divisors (see below), whose sum is σ = 1429974000. Its totient is φ = 905103360.

The previous prime is 1161156653. The next prime is 1161156673. The reversal of 1161156655 is 5566511611.

It is not a de Polignac number, because 1161156655 - 2¹ = 1161156653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161156653) 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, 2585871 + ... + 2586319.

It is an arithmetic number, because the mean of its divisors is an integer number (59582250).

Almost surely, 2^1161156655 is an apocalyptic number.

1161156655 is a deficient number, since it is larger than the sum of its proper divisors (268817345).

1161156655 is an equidigital number, since it uses as much as digits as its factorization.

1161156655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 654 counting only the distinct ones).

The product of its digits is 27000, while the sum is 37.

The square root of 1161156655 is about 34075.7487812080. The cubic root of 1161156655 is about 1051.0666877233.

The spelling of 1161156655 in words is "one billion, one hundred sixty-one million, one hundred fifty-six thousand, six hundred fifty-five".