57642557 has 8 divisors (see below), whose sum is σ = 66805632. Its totient is φ = 48711600.

The previous prime is 57642553. The next prime is 57642581. The reversal of 57642557 is 75524675.

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

It is not a de Polignac number, because 57642557 - 2² = 57642553 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 (57642551) 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 7 ways as a sum of consecutive naturals, for example, 57494 + ... + 58487.

It is an arithmetic number, because the mean of its divisors is an integer number (8350704).

Almost surely, 2^57642557 is an apocalyptic number.

It is an amenable number.

57642557 is a deficient number, since it is larger than the sum of its proper divisors (9163075).

57642557 is a wasteful number, since it uses less digits than its factorization.

57642557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116059.

The product of its digits is 294000, while the sum is 41.

The square root of 57642557 is about 7592.2695552779. The cubic root of 57642557 is about 386.2908423068.

The spelling of 57642557 in words is "fifty-seven million, six hundred forty-two thousand, five hundred fifty-seven".