1161051605 has 16 divisors (see below), whose sum is σ = 1593356160. Its totient is φ = 795621312.

The previous prime is 1161051599. The next prime is 1161051623. The reversal of 1161051605 is 5061501611.

It is a cyclic number.

It is not a de Polignac number, because 1161051605 - 2²² = 1156857301 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46751 + ... + 67139.

It is an arithmetic number, because the mean of its divisors is an integer number (99584760).

Almost surely, 2^1161051605 is an apocalyptic number.

It is an amenable number.

1161051605 is a deficient number, since it is larger than the sum of its proper divisors (432304555).

1161051605 is a wasteful number, since it uses less digits than its factorization.

1161051605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22028.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 1161051605 is about 34074.2073275373. The cubic root of 1161051605 is about 1051.0349900521.

The spelling of 1161051605 in words is "one billion, one hundred sixty-one million, fifty-one thousand, six hundred five".