1139772865 has 16 divisors (see below), whose sum is σ = 1705219200. Its totient is φ = 710507520.

The previous prime is 1139772863. The next prime is 1139772913. The reversal of 1139772865 is 5682779311.

It is a happy number.

It is not a de Polignac number, because 1139772865 - 2¹ = 1139772863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1139772863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1479840 + ... + 1480609.

It is an arithmetic number, because the mean of its divisors is an integer number (106576200).

Almost surely, 2^1139772865 is an apocalyptic number.

It is an amenable number.

1139772865 is a deficient number, since it is larger than the sum of its proper divisors (565446335).

1139772865 is a wasteful number, since it uses less digits than its factorization.

1139772865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2960472.

The product of its digits is 635040, while the sum is 49.

The square root of 1139772865 is about 33760.5222856519. The cubic root of 1139772865 is about 1044.5745435011.

The spelling of 1139772865 in words is "one billion, one hundred thirty-nine million, seven hundred seventy-two thousand, eight hundred sixty-five".