5561664432 has 80 divisors (see below), whose sum is σ = 14920065888. Its totient is φ = 1783848960.

The previous prime is 5561664421. The next prime is 5561664463. The reversal of 5561664432 is 2344661655.

It is a super-2 number, since 2×5561664432² = 61864222508347765248, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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, 124308 + ... + 163020.

Almost surely, 2^5561664432 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 5561664432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7460032944).

5561664432 is an abundant number, since it is smaller than the sum of its proper divisors (9358401456).

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

5561664432 is a wasteful number, since it uses less digits than its factorization.

5561664432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38838 (or 38832 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The square root of 5561664432 is about 74576.5675799041. The cubic root of 5561664432 is about 1771.7465424997.

The spelling of 5561664432 in words is "five billion, five hundred sixty-one million, six hundred sixty-four thousand, four hundred thirty-two".