5571781632 has 132 divisors (see below), whose sum is σ = 16271562060. Its totient is φ = 1836122112.

The previous prime is 5571781627. The next prime is 5571781639. The reversal of 5571781632 is 2361871755.

It is a happy number.

5571781632 is a `hidden beast` number, since 5 + 5 + 7 + 1 + 7 + 8 + 1 + 632 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 807469056 + 4764312576 = 28416^2 + 69024^2 .

It is not an unprimeable number, because it can be changed into a prime (5571781639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 816828 + ... + 823620.

Almost surely, 2^5571781632 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 5571781632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8135781030).

5571781632 is an abundant number, since it is smaller than the sum of its proper divisors (10699780428).

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

5571781632 is a wasteful number, since it uses less digits than its factorization.

5571781632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6908 (or 6887 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 5571781632 is about 74644.3677178660. The cubic root of 5571781632 is about 1772.8202172448.

The spelling of 5571781632 in words is "five billion, five hundred seventy-one million, seven hundred eighty-one thousand, six hundred thirty-two".