1388768421285 has 128 divisors (see below), whose sum is σ = 2854932480000. Its totient is φ = 627379416576.

The previous prime is 1388768421283. The next prime is 1388768421331. The reversal of 1388768421285 is 5821248678831.

1388768421285 is a `hidden beast` number, since 138 + 8 + 76 + 8 + 421 + 2 + 8 + 5 = 666.

It is not a de Polignac number, because 1388768421285 - 2¹ = 1388768421283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388768421281) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 201764454 + ... + 201771336.

It is an arithmetic number, because the mean of its divisors is an integer number (22304160000).

Almost surely, 2^{1388768421285} is an apocalyptic number.

1388768421285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1388768421285 is an abundant number, since it is smaller than the sum of its proper divisors (1466164058715).

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

1388768421285 is a wasteful number, since it uses less digits than its factorization.

1388768421285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9392 (or 9386 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 63.

The spelling of 1388768421285 in words is "one trillion, three hundred eighty-eight billion, seven hundred sixty-eight million, four hundred twenty-one thousand, two hundred eighty-five".