1091770165 has 16 divisors (see below), whose sum is σ = 1318052736. Its totient is φ = 868148800.

The previous prime is 1091770157. The next prime is 1091770171. The reversal of 1091770165 is 5610771901.

It is not a de Polignac number, because 1091770165 - 2³ = 1091770157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 716094 + ... + 717616.

It is an arithmetic number, because the mean of its divisors is an integer number (82378296).

Almost surely, 2^1091770165 is an apocalyptic number.

It is an amenable number.

1091770165 is a deficient number, since it is larger than the sum of its proper divisors (226282571).

1091770165 is a wasteful number, since it uses less digits than its factorization.

1091770165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300.

The product of its (nonzero) digits is 13230, while the sum is 37.

The square root of 1091770165 is about 33041.9455389661. The cubic root of 1091770165 is about 1029.6992759554.

The spelling of 1091770165 in words is "one billion, ninety-one million, seven hundred seventy thousand, one hundred sixty-five".