57123432565 has 4 divisors (see below), whose sum is σ = 68548119084. Its totient is φ = 45698746048.

The previous prime is 57123432551. The next prime is 57123432571. The reversal of 57123432565 is 56523432175.

It is a happy number.

57123432565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 14670538884 + 42452893681 = 121122^2 + 206041^2 .

It is a cyclic number.

It is not a de Polignac number, because 57123432565 - 2⁷ = 57123432437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5712343252 + ... + 5712343261.

It is an arithmetic number, because the mean of its divisors is an integer number (17137029771).

Almost surely, 2^57123432565 is an apocalyptic number.

It is an amenable number.

57123432565 is a deficient number, since it is larger than the sum of its proper divisors (11424686519).

57123432565 is a wasteful number, since it uses less digits than its factorization.

57123432565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11424686518.

The product of its digits is 756000, while the sum is 43.

The spelling of 57123432565 in words is "fifty-seven billion, one hundred twenty-three million, four hundred thirty-two thousand, five hundred sixty-five".