981481556 has 24 divisors (see below), whose sum is σ = 1972356960. Its totient is φ = 422647200.

The previous prime is 981481477. The next prime is 981481559. The reversal of 981481556 is 655184189.

It is a happy number.

It is a super-2 number, since 2×981481556² = 1926612089536362272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 981481556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981481559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586175 + ... + 587846.

It is an arithmetic number, because the mean of its divisors is an integer number (82181540).

Almost surely, 2^981481556 is an apocalyptic number.

It is an amenable number.

981481556 is an abundant number, since it is smaller than the sum of its proper divisors (990875404).

981481556 is a wasteful number, since it uses less digits than its factorization.

981481556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174055 (or 1174053 counting only the distinct ones).

The product of its digits is 345600, while the sum is 47.

The square root of 981481556 is about 31328.6060334640. The cubic root of 981481556 is about 993.7886847749.

The spelling of 981481556 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, five hundred fifty-six".