5661778432 has 40 divisors (see below), whose sum is σ = 11439697500. Its totient is φ = 2799058944.

The previous prime is 5661778427. The next prime is 5661778459. The reversal of 5661778432 is 2348771665.

It can be written as a sum of positive squares in 2 ways, for example, as 5652633856 + 9144576 = 75184^2 + 3024^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16557 + ... + 107692.

Almost surely, 2^5661778432 is an apocalyptic number.

It is an amenable number.

5661778432 is an abundant number, since it is smaller than the sum of its proper divisors (5777919068).

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

5661778432 is an equidigital number, since it uses as much as digits as its factorization.

5661778432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124356 (or 124340 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 49.

The square root of 5661778432 is about 75244.7900654922. The cubic root of 5661778432 is about 1782.3142931046.

The spelling of 5661778432 in words is "five billion, six hundred sixty-one million, seven hundred seventy-eight thousand, four hundred thirty-two".