981481655 has 64 divisors (see below), whose sum is σ = 1608698880. Its totient is φ = 555878400.

The previous prime is 981481609. The next prime is 981481663. The reversal of 981481655 is 556184189.

It is a happy number.

It is not a de Polignac number, because 981481655 - 2¹⁰ = 981480631 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 187220 + ... + 192390.

It is an arithmetic number, because the mean of its divisors is an integer number (25135920).

Almost surely, 2^981481655 is an apocalyptic number.

981481655 is a deficient number, since it is larger than the sum of its proper divisors (627217225).

981481655 is a wasteful number, since it uses less digits than its factorization.

981481655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5240.

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

The square root of 981481655 is about 31328.6076134896. The cubic root of 981481655 is about 993.7887181887.

The spelling of 981481655 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, six hundred fifty-five".