1381775266576 has 80 divisors (see below), whose sum is σ = 2775782338560. Its totient is φ = 665644913280.

The previous prime is 1381775266559. The next prime is 1381775266609. The reversal of 1381775266576 is 6756625771831.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365643855 + ... + 365647633.

It is an arithmetic number, because the mean of its divisors is an integer number (34697279232).

Almost surely, 2^{1381775266576} is an apocalyptic number.

1381775266576 is a gapful number since it is divisible by the number (16) 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 1381775266576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387891169280).

1381775266576 is an abundant number, since it is smaller than the sum of its proper divisors (1394007071984).

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

1381775266576 is a wasteful number, since it uses less digits than its factorization.

1381775266576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6884 (or 6878 counting only the distinct ones).

The product of its digits is 88905600, while the sum is 64.

The spelling of 1381775266576 in words is "one trillion, three hundred eighty-one billion, seven hundred seventy-five million, two hundred sixty-six thousand, five hundred seventy-six".