1065557911 has 4 divisors (see below), whose sum is σ = 1162426824. Its totient is φ = 968689000.

The previous prime is 1065557903. The next prime is 1065557939. The reversal of 1065557911 is 1197555601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1197555601 = 11 ⋅108868691.

It is a cyclic number.

It is not a de Polignac number, because 1065557911 - 2³ = 1065557903 is a prime.

It is a super-2 number, since 2×1065557911² = 2270827323389367842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065557011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48434440 + ... + 48434461.

It is an arithmetic number, because the mean of its divisors is an integer number (290606706).

Almost surely, 2^1065557911 is an apocalyptic number.

1065557911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1065557911 is a deficient number, since it is larger than the sum of its proper divisors (96868913).

1065557911 is an equidigital number, since it uses as much as digits as its factorization.

1065557911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96868912.

The product of its (nonzero) digits is 47250, while the sum is 40.

The square root of 1065557911 is about 32642.8845385943. The cubic root of 1065557911 is about 1021.3917663216.

The spelling of 1065557911 in words is "one billion, sixty-five million, five hundred fifty-seven thousand, nine hundred eleven".