1381143668081 has 8 divisors (see below), whose sum is σ = 1438313478144. Its totient is φ = 1324762407360.

The previous prime is 1381143668029. The next prime is 1381143668087. The reversal of 1381143668081 is 1808663411831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381143668081 is a prime.

It is a super-2 number, since 2×1381143668081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381143668087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197133761 + ... + 197140766.

It is an arithmetic number, because the mean of its divisors is an integer number (179789184768).

Almost surely, 2^{1381143668081} is an apocalyptic number.

It is an amenable number.

1381143668081 is a deficient number, since it is larger than the sum of its proper divisors (57169810063).

1381143668081 is a wasteful number, since it uses less digits than its factorization.

1381143668081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394274671.

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 1381143668081 in words is "one trillion, three hundred eighty-one billion, one hundred forty-three million, six hundred sixty-eight thousand, eighty-one".