981481564 has 36 divisors (see below), whose sum is σ = 2026185840. Its totient is φ = 414704640.

The previous prime is 981481561. The next prime is 981481601. The reversal of 981481564 is 465184189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981481561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21349 + ... + 49180.

It is an arithmetic number, because the mean of its divisors is an integer number (56282940).

Almost surely, 2^981481564 is an apocalyptic number.

It is an amenable number.

981481564 is an abundant number, since it is smaller than the sum of its proper divisors (1044704276).

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

981481564 is a wasteful number, since it uses less digits than its factorization.

981481564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70618 (or 70609 counting only the distinct ones).

The product of its digits is 276480, while the sum is 46.

The square root of 981481564 is about 31328.6061611429. The cubic root of 981481564 is about 993.7886874750.

It can be divided in two parts, 9814 and 81564, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 981481564 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, five hundred sixty-four".