43725510557 has 8 divisors (see below), whose sum is σ = 44138713080. Its totient is φ = 43312527360.

The previous prime is 43725510481. The next prime is 43725510601. The reversal of 43725510557 is 75501552734.

It can be written as a sum of positive squares in 4 ways, for example, as 3118756 + 43722391801 = 1766^2 + 209099^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 43725510557 - 2¹⁴ = 43725494173 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 (43725512557) 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, 360557 + ... + 466317.

It is an arithmetic number, because the mean of its divisors is an integer number (5517339135).

Almost surely, 2^43725510557 is an apocalyptic number.

It is an amenable number.

43725510557 is a deficient number, since it is larger than the sum of its proper divisors (413202523).

43725510557 is a wasteful number, since it uses less digits than its factorization.

43725510557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109663.

The product of its (nonzero) digits is 735000, while the sum is 44.

The spelling of 43725510557 in words is "forty-three billion, seven hundred twenty-five million, five hundred ten thousand, five hundred fifty-seven".