981550631009 has 8 divisors (see below), whose sum is σ = 1064659236480. Its totient is φ = 899528412816.

The previous prime is 981550630961. The next prime is 981550631041. The reversal of 981550631009 is 900136055189.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981550631009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (981550631069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271594937 + ... + 271598550.

It is an arithmetic number, because the mean of its divisors is an integer number (133082404560).

Almost surely, 2^981550631009 is an apocalyptic number.

It is an amenable number.

981550631009 is a deficient number, since it is larger than the sum of its proper divisors (83108605471).

981550631009 is a wasteful number, since it uses less digits than its factorization.

981550631009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543193639.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 981550631009 in words is "nine hundred eighty-one billion, five hundred fifty million, six hundred thirty-one thousand, nine".