544140757 has 4 divisors (see below), whose sum is σ = 545755756. Its totient is φ = 542525760.

The previous prime is 544140721. The next prime is 544140787. The reversal of 544140757 is 757041445.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 282542481 + 261598276 = 16809^2 + 16174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-544140757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544140787) 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 3 ways as a sum of consecutive naturals, for example, 806994 + ... + 807667.

It is an arithmetic number, because the mean of its divisors is an integer number (136438939).

Almost surely, 2^544140757 is an apocalyptic number.

It is an amenable number.

544140757 is a deficient number, since it is larger than the sum of its proper divisors (1614999).

544140757 is a wasteful number, since it uses less digits than its factorization.

544140757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614998.

The product of its (nonzero) digits is 78400, while the sum is 37.

The square root of 544140757 is about 23326.8248375127. The cubic root of 544140757 is about 816.4014213618.

The spelling of 544140757 in words is "five hundred forty-four million, one hundred forty thousand, seven hundred fifty-seven".