39642857557 has 8 divisors (see below), whose sum is σ = 39692408000. Its totient is φ = 39593340864.

The previous prime is 39642857537. The next prime is 39642857593. The reversal of 39642857557 is 75575824693.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39642857557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39642857495 and 39642857504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39642857537) 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, 2951944 + ... + 2965342.

It is an arithmetic number, because the mean of its divisors is an integer number (4961551000).

Almost surely, 2^39642857557 is an apocalyptic number.

It is an amenable number.

39642857557 is a deficient number, since it is larger than the sum of its proper divisors (49550443).

39642857557 is a wasteful number, since it uses less digits than its factorization.

39642857557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16875.

The product of its digits is 63504000, while the sum is 61.

The spelling of 39642857557 in words is "thirty-nine billion, six hundred forty-two million, eight hundred fifty-seven thousand, five hundred fifty-seven".