5664470981 has 32 divisors (see below), whose sum is σ = 6505191168. Its totient is φ = 4892659200.

The previous prime is 5664470957. The next prime is 5664470993. The reversal of 5664470981 is 1890744665.

It is not a de Polignac number, because 5664470981 - 2¹⁴ = 5664454597 is a prime.

It is a super-2 number, since 2×5664470981² = 64172462989182204722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5664470081) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3144281 + ... + 3146081.

It is an arithmetic number, because the mean of its divisors is an integer number (203287224).

Almost surely, 2^5664470981 is an apocalyptic number.

It is an amenable number.

5664470981 is a deficient number, since it is larger than the sum of its proper divisors (840720187).

5664470981 is a wasteful number, since it uses less digits than its factorization.

5664470981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 5664470981 is about 75262.6798685776. The cubic root of 5664470981 is about 1782.5967843209.

The spelling of 5664470981 in words is "five billion, six hundred sixty-four million, four hundred seventy thousand, nine hundred eighty-one".