1139965565 has 16 divisors (see below), whose sum is σ = 1376037120. Its totient is φ = 906603840.

The previous prime is 1139965559. The next prime is 1139965571. The reversal of 1139965565 is 5655699311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1139965559) and next prime (1139965571).

It is not a de Polignac number, because 1139965565 - 2¹⁰ = 1139964541 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, 1065851 + ... + 1066919.

It is an arithmetic number, because the mean of its divisors is an integer number (86002320).

Almost surely, 2^1139965565 is an apocalyptic number.

It is an amenable number.

1139965565 is a deficient number, since it is larger than the sum of its proper divisors (236071555).

1139965565 is a wasteful number, since it uses less digits than its factorization.

1139965565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132.

The product of its digits is 1093500, while the sum is 50.

The square root of 1139965565 is about 33763.3760900772. The cubic root of 1139965565 is about 1044.6334084961.

The spelling of 1139965565 in words is "one billion, one hundred thirty-nine million, nine hundred sixty-five thousand, five hundred sixty-five".