1938243178368 has 672 divisors, whose sum is σ = 6828000204960. Its totient is φ = 546103627776.

The previous prime is 1938243178363. The next prime is 1938243178373. The reversal of 1938243178368 is 8638713428391.

1938243178368 is a `hidden beast` number, since 1 + 93 + 82 + 43 + 1 + 78 + 368 = 666.

It is an interprime number because it is at equal distance from previous prime (1938243178363) and next prime (1938243178373).

It is a tau number, because it is divible by the number of its divisors (672).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938243178363) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 333774121 + ... + 333779927.

Almost surely, 2^{1938243178368} is an apocalyptic number.

1938243178368 is a gapful number since it is divisible by the number (18) 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 1938243178368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3414000102480).

1938243178368 is an abundant number, since it is smaller than the sum of its proper divisors (4889757026592).

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

1938243178368 is an frugal number, since it uses more digits than its factorization.

1938243178368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5926 (or 5892 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 1938243178368 in words is "one trillion, nine hundred thirty-eight billion, two hundred forty-three million, one hundred seventy-eight thousand, three hundred sixty-eight".