1381804563 has 16 divisors (see below), whose sum is σ = 1867289600. Its totient is φ = 908781120.

The previous prime is 1381804561. The next prime is 1381804573. The reversal of 1381804563 is 3654081831.

It is not a de Polignac number, because 1381804563 - 2¹ = 1381804561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381804561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493698 + ... + 496488.

It is an arithmetic number, because the mean of its divisors is an integer number (116705600).

Almost surely, 2^1381804563 is an apocalyptic number.

1381804563 is a deficient number, since it is larger than the sum of its proper divisors (485485037).

1381804563 is a wasteful number, since it uses less digits than its factorization.

1381804563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4962.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 1381804563 is about 37172.6319084350. The cubic root of 1381804563 is about 1113.8213564886.

The spelling of 1381804563 in words is "one billion, three hundred eighty-one million, eight hundred four thousand, five hundred sixty-three".