981493567040 has 448 divisors, whose sum is σ = 2968142400000. Its totient is φ = 307788816384.

The previous prime is 981493567009. The next prime is 981493567063. The reversal of 981493567040 is 40765394189.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60469646 + ... + 60485874.

Almost surely, 2^981493567040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981493567040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484071200000).

981493567040 is an abundant number, since it is smaller than the sum of its proper divisors (1986648832960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981493567040 is a wasteful number, since it uses less digits than its factorization.

981493567040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16315 (or 16291 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 981493567040 in words is "nine hundred eighty-one billion, four hundred ninety-three million, five hundred sixty-seven thousand, forty".