49439685857 has 8 divisors (see below), whose sum is σ = 51592910784. Its totient is φ = 47286767088.

The previous prime is 49439685847. The next prime is 49439685913. The reversal of 49439685857 is 75858693494.

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-49439685857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49439685847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291083 + ... + 428495.

It is an arithmetic number, because the mean of its divisors is an integer number (6449113848).

Almost surely, 2^49439685857 is an apocalyptic number.

It is an amenable number.

49439685857 is a deficient number, since it is larger than the sum of its proper divisors (2153224927).

49439685857 is a wasteful number, since it uses less digits than its factorization.

49439685857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153079.

The product of its digits is 261273600, while the sum is 68.

The spelling of 49439685857 in words is "forty-nine billion, four hundred thirty-nine million, six hundred eighty-five thousand, eight hundred fifty-seven".