981481585 has 16 divisors (see below), whose sum is σ = 1349407872. Its totient is φ = 671328000.

The previous prime is 981481561. The next prime is 981481601. The reversal of 981481585 is 585184189.

It is not a de Polignac number, because 981481585 - 2¹¹ = 981479537 is a prime.

It is a super-2 number, since 2×981481585² = 1926612203388224450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20931 + ... + 49000.

It is an arithmetic number, because the mean of its divisors is an integer number (84337992).

Almost surely, 2^981481585 is an apocalyptic number.

It is an amenable number.

981481585 is a deficient number, since it is larger than the sum of its proper divisors (367926287).

981481585 is a wasteful number, since it uses less digits than its factorization.

981481585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70344.

The product of its digits is 460800, while the sum is 49.

The square root of 981481585 is about 31328.6064962998. The cubic root of 981481585 is about 993.7886945628.

The spelling of 981481585 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, five hundred eighty-five".