1381966393697 has 8 divisors (see below), whose sum is σ = 1446087682560. Its totient is φ = 1319066462880.

The previous prime is 1381966393693. The next prime is 1381966393739. The reversal of 1381966393697 is 7963936691831.

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

It is a cyclic number.

It is not a de Polignac number, because 1381966393697 - 2² = 1381966393693 is a prime.

It is a super-2 number, since 2×1381966393697² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1381966393697.

It is not an unprimeable number, because it can be changed into a prime (1381966393693) 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, 305337197 + ... + 305341722.

It is an arithmetic number, because the mean of its divisors is an integer number (180760960320).

Almost surely, 2^{1381966393697} is an apocalyptic number.

It is an amenable number.

1381966393697 is a deficient number, since it is larger than the sum of its proper divisors (64121288863).

1381966393697 is an equidigital number, since it uses as much as digits as its factorization.

1381966393697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610679023.

The product of its digits is 238085568, while the sum is 71.

The spelling of 1381966393697 in words is "one trillion, three hundred eighty-one billion, nine hundred sixty-six million, three hundred ninety-three thousand, six hundred ninety-seven".