1338775787136 has 64 divisors (see below), whose sum is σ = 3623219903520. Its totient is φ = 437838615552.

The previous prime is 1338775787131. The next prime is 1338775787143. The reversal of 1338775787136 is 6317875778331.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (1338775787131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32870170 + ... + 32910873.

Almost surely, 2^{1338775787136} is an apocalyptic number.

1338775787136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1338775787136 is an abundant number, since it is smaller than the sum of its proper divisors (2284444116384).

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

1338775787136 is an equidigital number, since it uses as much as digits as its factorization.

1338775787136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65781113 (or 65781101 counting only the distinct ones).

The product of its digits is 124467840, while the sum is 66.

The spelling of 1338775787136 in words is "one trillion, three hundred thirty-eight billion, seven hundred seventy-five million, seven hundred eighty-seven thousand, one hundred thirty-six".