5644631772 has 90 divisors (see below), whose sum is σ = 15978743088. Its totient is φ = 1736792928.

The previous prime is 5644631747. The next prime is 5644631819. The reversal of 5644631772 is 2771364465.

5644631772 is a `hidden beast` number, since 5 + 6 + 4 + 4 + 631 + 7 + 7 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3213 + ... + 106299.

Almost surely, 2^5644631772 is an apocalyptic number.

5644631772 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5644631772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7989371544).

5644631772 is an abundant number, since it is smaller than the sum of its proper divisors (10334111316).

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

5644631772 is a wasteful number, since it uses less digits than its factorization.

5644631772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103129 (or 103105 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 5644631772 is about 75130.7644843309. The cubic root of 5644631772 is about 1780.5132312077.

The spelling of 5644631772 in words is "five billion, six hundred forty-four million, six hundred thirty-one thousand, seven hundred seventy-two".