1549384564 has 108 divisors (see below), whose sum is σ = 3545275104. Its totient is φ = 580042944.

The previous prime is 1549384561. The next prime is 1549384579. The reversal of 1549384564 is 4654839451.

It is a super-2 number, since 2×1549384564² = 4801185054322940192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1549384561) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1707799 + ... + 1708705.

Almost surely, 2^1549384564 is an apocalyptic number.

1549384564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1549384564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1772637552).

1549384564 is an abundant number, since it is smaller than the sum of its proper divisors (1995890540).

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

1549384564 is a wasteful number, since it uses less digits than its factorization.

1549384564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982 (or 948 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 49.

The square root of 1549384564 is about 39362.2225490381. Note that the first 3 decimals coincide. The cubic root of 1549384564 is about 1157.1413369400.

The spelling of 1549384564 in words is "one billion, five hundred forty-nine million, three hundred eighty-four thousand, five hundred sixty-four".