1271783939328 has 720 divisors, whose sum is σ = 4453612732800. Its totient is φ = 360808390656.

The previous prime is 1271783939317. The next prime is 1271783939341. The reversal of 1271783939328 is 8239393871721.

1271783939328 is a `hidden beast` number, since 1 + 2 + 71 + 78 + 393 + 93 + 28 = 666.

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 an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1159328476 + ... + 1159329572.

It is an arithmetic number, because the mean of its divisors is an integer number (6185573240).

Almost surely, 2^{1271783939328} is an apocalyptic number.

1271783939328 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 1271783939328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2226806366400).

1271783939328 is an abundant number, since it is smaller than the sum of its proper divisors (3181828793472).

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

1271783939328 is an equidigital number, since it uses as much as digits as its factorization.

1271783939328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309 (or 1272 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 1271783939328 in words is "one trillion, two hundred seventy-one billion, seven hundred eighty-three million, nine hundred thirty-nine thousand, three hundred twenty-eight".