4540544781 has 4 divisors (see below), whose sum is σ = 6054059712. Its totient is φ = 3027029852.

The previous prime is 4540544689. The next prime is 4540544803. The reversal of 4540544781 is 1874450454.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4540544781 - 2¹⁰ = 4540543757 is a prime.

It is a super-2 number, since 2×4540544781² = 41233093816532675922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4540594781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756757461 + ... + 756757466.

It is an arithmetic number, because the mean of its divisors is an integer number (1513514928).

Almost surely, 2^4540544781 is an apocalyptic number.

It is an amenable number.

4540544781 is a deficient number, since it is larger than the sum of its proper divisors (1513514931).

4540544781 is a wasteful number, since it uses less digits than its factorization.

4540544781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513514930.

The product of its (nonzero) digits is 358400, while the sum is 42.

The square root of 4540544781 is about 67383.5646207590. The cubic root of 4540544781 is about 1655.9071742964.

The spelling of 4540544781 in words is "four billion, five hundred forty million, five hundred forty-four thousand, seven hundred eighty-one".