5644531491 has 8 divisors (see below), whose sum is σ = 7768817664. Its totient is φ = 3641633160.

The previous prime is 5644531489. The next prime is 5644531507. The reversal of 5644531491 is 1941354465.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5644531491 - 2¹ = 5644531489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5644531691) 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, 30346851 + ... + 30347036.

It is an arithmetic number, because the mean of its divisors is an integer number (971102208).

Almost surely, 2^5644531491 is an apocalyptic number.

5644531491 is a deficient number, since it is larger than the sum of its proper divisors (2124286173).

5644531491 is a wasteful number, since it uses less digits than its factorization.

5644531491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60693921.

The product of its digits is 259200, while the sum is 42.

The square root of 5644531491 is about 75130.0971049552. The cubic root of 5644531491 is about 1780.5026871066.

The spelling of 5644531491 in words is "five billion, six hundred forty-four million, five hundred thirty-one thousand, four hundred ninety-one".