1368739665 has 24 divisors (see below), whose sum is σ = 2427659520. Its totient is φ = 713016864.

The previous prime is 1368739661. The next prime is 1368739693. The reversal of 1368739665 is 5669378631.

It is not a de Polignac number, because 1368739665 - 2² = 1368739661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1368739661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351745 + ... + 355614.

It is an arithmetic number, because the mean of its divisors is an integer number (101152480).

Almost surely, 2^1368739665 is an apocalyptic number.

1368739665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1368739665 is a deficient number, since it is larger than the sum of its proper divisors (1058919855).

1368739665 is a wasteful number, since it uses less digits than its factorization.

1368739665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707413 (or 707410 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 1368739665 is about 36996.4817921921. The cubic root of 1368739665 is about 1110.2998581166.

The spelling of 1368739665 in words is "one billion, three hundred sixty-eight million, seven hundred thirty-nine thousand, six hundred sixty-five".