1381305105843 has 32 divisors (see below), whose sum is σ = 1996072968960. Its totient is φ = 844624176000.

The previous prime is 1381305105841. The next prime is 1381305105847. The reversal of 1381305105843 is 3485015031831.

It is not a de Polignac number, because 1381305105843 - 2¹ = 1381305105841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1381305105795 and 1381305105804.

It is not an unprimeable number, because it can be changed into a prime (1381305105841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3933205 + ... + 4269977.

It is an arithmetic number, because the mean of its divisors is an integer number (62377280280).

Almost surely, 2^{1381305105843} is an apocalyptic number.

1381305105843 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1381305105843 is a deficient number, since it is larger than the sum of its proper divisors (614767863117).

1381305105843 is a wasteful number, since it uses less digits than its factorization.

1381305105843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337459.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 1381305105843 in words is "one trillion, three hundred eighty-one billion, three hundred five million, one hundred five thousand, eight hundred forty-three".