1383844540787 has 4 divisors (see below), whose sum is σ = 1428484687296. Its totient is φ = 1339204394280.

The previous prime is 1383844540747. The next prime is 1383844540807. The reversal of 1383844540787 is 7870454483831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1383844540787 - 2⁶ = 1383844540723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1383844540747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22320073208 + ... + 22320073269.

It is an arithmetic number, because the mean of its divisors is an integer number (357121171824).

Almost surely, 2^{1383844540787} is an apocalyptic number.

1383844540787 is a deficient number, since it is larger than the sum of its proper divisors (44640146509).

1383844540787 is an equidigital number, since it uses as much as digits as its factorization.

1383844540787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44640146508.

The product of its (nonzero) digits is 72253440, while the sum is 62.

The spelling of 1383844540787 in words is "one trillion, three hundred eighty-three billion, eight hundred forty-four million, five hundred forty thousand, seven hundred eighty-seven".