1383581561 has 8 divisors (see below), whose sum is σ = 1442565120. Its totient is φ = 1325349648.

The previous prime is 1383581467. The next prime is 1383581579. The reversal of 1383581561 is 1651853831.

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

It is not a de Polignac number, because 1383581561 - 2¹⁰ = 1383580537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1383581461) 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, 184151 + ... + 191516.

It is an arithmetic number, because the mean of its divisors is an integer number (180320640).

Almost surely, 2^1383581561 is an apocalyptic number.

It is an amenable number.

1383581561 is a deficient number, since it is larger than the sum of its proper divisors (58983559).

1383581561 is a wasteful number, since it uses less digits than its factorization.

1383581561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375823.

The product of its digits is 86400, while the sum is 41.

The square root of 1383581561 is about 37196.5261953317. The cubic root of 1383581561 is about 1114.2986093362.

The spelling of 1383581561 in words is "one billion, three hundred eighty-three million, five hundred eighty-one thousand, five hundred sixty-one".