981783156441 has 4 divisors (see below), whose sum is σ = 1309044208592. Its totient is φ = 654522104292.

The previous prime is 981783156427. The next prime is 981783156461. The reversal of 981783156441 is 144651387189.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 144651387189 = 3 ⋅48217129063.

It is not a de Polignac number, because 981783156441 - 2⁶ = 981783156377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981783156461) 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, 163630526071 + ... + 163630526076.

It is an arithmetic number, because the mean of its divisors is an integer number (327261052148).

Almost surely, 2^981783156441 is an apocalyptic number.

It is an amenable number.

981783156441 is a deficient number, since it is larger than the sum of its proper divisors (327261052151).

981783156441 is a wasteful number, since it uses less digits than its factorization.

981783156441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327261052150.

The product of its digits is 5806080, while the sum is 57.

The spelling of 981783156441 in words is "nine hundred eighty-one billion, seven hundred eighty-three million, one hundred fifty-six thousand, four hundred forty-one".