1388315501712 has 200 divisors, whose sum is σ = 4115370099456. Its totient is φ = 451635554304.

The previous prime is 1388315501681. The next prime is 1388315501761. The reversal of 1388315501712 is 2171055138831.

1388315501712 is a `hidden beast` number, since 1 + 3 + 8 + 83 + 1 + 550 + 1 + 7 + 12 = 666.

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 39 ways as a sum of consecutive naturals, for example, 21469653 + ... + 21534219.

Almost surely, 2^{1388315501712} is an apocalyptic number.

1388315501712 is a gapful number since it is divisible by the number (12) 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 1388315501712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2057685049728).

1388315501712 is an abundant number, since it is smaller than the sum of its proper divisors (2727054597744).

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

1388315501712 is a wasteful number, since it uses less digits than its factorization.

1388315501712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64987 (or 64972 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The spelling of 1388315501712 in words is "one trillion, three hundred eighty-eight billion, three hundred fifteen million, five hundred one thousand, seven hundred twelve".