1368129136 has 40 divisors (see below), whose sum is σ = 2906782704. Its totient is φ = 618639360.

The previous prime is 1368129109. The next prime is 1368129149. The reversal of 1368129136 is 6319218631.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13830 + ... + 54106.

Almost surely, 2^1368129136 is an apocalyptic number.

1368129136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1368129136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1453391352).

1368129136 is an abundant number, since it is smaller than the sum of its proper divisors (1538653568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1368129136 is a wasteful number, since it uses less digits than its factorization.

1368129136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40489 (or 40483 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 1368129136 is about 36988.2296954045. The cubic root of 1368129136 is about 1110.1347497587.

The spelling of 1368129136 in words is "one billion, three hundred sixty-eight million, one hundred twenty-nine thousand, one hundred thirty-six".