49856704657 has 4 divisors (see below), whose sum is σ = 49857769780. Its totient is φ = 49855639536.

The previous prime is 49856704637. The next prime is 49856704693. The reversal of 49856704657 is 75640765894.

It is a happy number.

49856704657 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 2194828801 + 47661875856 = 46849^2 + 218316^2 .

It is a cyclic number.

It is not a de Polignac number, because 49856704657 - 2⁷ = 49856704529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49856704595 and 49856704604.

It is not an unprimeable number, because it can be changed into a prime (49856704637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458958 + ... + 557095.

It is an arithmetic number, because the mean of its divisors is an integer number (12464442445).

Almost surely, 2^49856704657 is an apocalyptic number.

It is an amenable number.

49856704657 is a deficient number, since it is larger than the sum of its proper divisors (1065123).

49856704657 is a wasteful number, since it uses less digits than its factorization.

49856704657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065122.

The product of its (nonzero) digits is 50803200, while the sum is 61.

The spelling of 49856704657 in words is "forty-nine billion, eight hundred fifty-six million, seven hundred four thousand, six hundred fifty-seven".