981580924641 has 4 divisors (see below), whose sum is σ = 1308774566192. Its totient is φ = 654387283092.

The previous prime is 981580924637. The next prime is 981580924699. The reversal of 981580924641 is 146429085189.

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.

It is not a de Polignac number, because 981580924641 - 2² = 981580924637 is a prime.

It is a super-2 number, since 2×981580924641² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981580924141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163596820771 + ... + 163596820776.

It is an arithmetic number, because the mean of its divisors is an integer number (327193641548).

Almost surely, 2^981580924641 is an apocalyptic number.

It is an amenable number.

981580924641 is a deficient number, since it is larger than the sum of its proper divisors (327193641551).

981580924641 is a wasteful number, since it uses less digits than its factorization.

981580924641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327193641550.

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 981580924641 in words is "nine hundred eighty-one billion, five hundred eighty million, nine hundred twenty-four thousand, six hundred forty-one".