1109265557 has 8 divisors (see below), whose sum is σ = 1112506776. Its totient is φ = 1106030592.

The previous prime is 1109265533. The next prime is 1109265569. The reversal of 1109265557 is 7555629011.

It can be written as a sum of positive squares in 4 ways, for example, as 379509361 + 729756196 = 19481^2 + 27014^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1109265557 - 2²⁶ = 1042156693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109265257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961493 + ... + 962645.

It is an arithmetic number, because the mean of its divisors is an integer number (139063347).

Almost surely, 2^1109265557 is an apocalyptic number.

It is an amenable number.

1109265557 is a deficient number, since it is larger than the sum of its proper divisors (3241219).

1109265557 is a wasteful number, since it uses less digits than its factorization.

1109265557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127.

The product of its (nonzero) digits is 94500, while the sum is 41.

The square root of 1109265557 is about 33305.6385166236. The cubic root of 1109265557 is about 1035.1703942819.

The spelling of 1109265557 in words is "one billion, one hundred nine million, two hundred sixty-five thousand, five hundred fifty-seven".