983569881449 has 4 divisors (see below), whose sum is σ = 983571928020. Its totient is φ = 983567834880.

The previous prime is 983569881443. The next prime is 983569881451. The reversal of 983569881449 is 944188965389.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944188965389 = 49991 ⋅18887179.

It can be written as a sum of positive squares in 2 ways, for example, as 424263336025 + 559306545424 = 651355^2 + 747868^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-983569881449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (983569881443) 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, 133529 + ... + 1408889.

It is an arithmetic number, because the mean of its divisors is an integer number (245892982005).

Almost surely, 2^983569881449 is an apocalyptic number.

It is an amenable number.

983569881449 is a deficient number, since it is larger than the sum of its proper divisors (2046571).

983569881449 is a wasteful number, since it uses less digits than its factorization.

983569881449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046570.

The product of its digits is 537477120, while the sum is 74.

The spelling of 983569881449 in words is "nine hundred eighty-three billion, five hundred sixty-nine million, eight hundred eighty-one thousand, four hundred forty-nine".