1673564544 has 128 divisors (see below), whose sum is σ = 4995756000. Its totient is φ = 551485440.

The previous prime is 1673564533. The next prime is 1673564569. The reversal of 1673564544 is 4454653761.

1673564544 is a `hidden beast` number, since 16 + 7 + 35 + 64 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 1673564544.

It is a congruent 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, 304864 + ... + 310304.

Almost surely, 2^1673564544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1673564544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2497878000).

1673564544 is an abundant number, since it is smaller than the sum of its proper divisors (3322191456).

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

1673564544 is an equidigital number, since it uses as much as digits as its factorization.

1673564544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5553 (or 5535 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The square root of 1673564544 is about 40909.2232143315. The cubic root of 1673564544 is about 1187.2645177241.

The spelling of 1673564544 in words is "one billion, six hundred seventy-three million, five hundred sixty-four thousand, five hundred forty-four".