5605661504 has 56 divisors (see below), whose sum is σ = 11742724800. Its totient is φ = 2647710720.

The previous prime is 5605661497. The next prime is 5605661507. The reversal of 5605661504 is 4051665065.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5605661507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430124 + ... + 442964.

Almost surely, 2^5605661504 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 5605661504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5871362400).

5605661504 is an abundant number, since it is smaller than the sum of its proper divisors (6137063296).

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

5605661504 is a wasteful number, since it uses less digits than its factorization.

5605661504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13231 (or 13221 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 5605661504 is about 74870.9656943197. The cubic root of 5605661504 is about 1776.4062390782.

The spelling of 5605661504 in words is "five billion, six hundred five million, six hundred sixty-one thousand, five hundred four".