4564131781 has 16 divisors (see below), whose sum is σ = 5128030080. Its totient is φ = 4025695680.

The previous prime is 4564131779. The next prime is 4564131809. The reversal of 4564131781 is 1871314654.

It is a cyclic number.

It is not a de Polignac number, because 4564131781 - 2¹ = 4564131779 is a prime.

It is a super-2 number, since 2×4564131781² = 41662597828668463922, 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 (4564131751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130495 + ... + 161731.

It is an arithmetic number, because the mean of its divisors is an integer number (320501880).

Almost surely, 2^4564131781 is an apocalyptic number.

It is an amenable number.

4564131781 is a deficient number, since it is larger than the sum of its proper divisors (563898299).

4564131781 is a wasteful number, since it uses less digits than its factorization.

4564131781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31644.

The product of its digits is 80640, while the sum is 40.

The square root of 4564131781 is about 67558.3583355901. The cubic root of 4564131781 is about 1658.7695654057.

The spelling of 4564131781 in words is "four billion, five hundred sixty-four million, one hundred thirty-one thousand, seven hundred eighty-one".