1113113665 has 16 divisors (see below), whose sum is σ = 1359354960. Its totient is φ = 874782720.

The previous prime is 1113113623. The next prime is 1113113671. The reversal of 1113113665 is 5663113111.

It can be written as a sum of positive squares in 8 ways, for example, as 605602881 + 507510784 = 24609^2 + 22528^2 .

It is not a de Polignac number, because 1113113665 - 2²¹ = 1111016513 is a prime.

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, 305937 + ... + 309553.

It is an arithmetic number, because the mean of its divisors is an integer number (84959685).

Almost surely, 2^1113113665 is an apocalyptic number.

It is an amenable number.

1113113665 is a deficient number, since it is larger than the sum of its proper divisors (246241295).

1113113665 is a wasteful number, since it uses less digits than its factorization.

1113113665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692.

The product of its digits is 1620, while the sum is 28.

The square root of 1113113665 is about 33363.3581193500. The cubic root of 1113113665 is about 1036.3660352582.

Adding to 1113113665 its reverse (5663113111), we get a palindrome (6776226776).

It can be divided in two parts, 1113113 and 665, that added together give a triangular number (1113778 = T₁₄₉₂).

The spelling of 1113113665 in words is "one billion, one hundred thirteen million, one hundred thirteen thousand, six hundred sixty-five".