204768139708857 has 8 divisors (see below), whose sum is σ = 273024685327680. Its totient is φ = 136511843614640.

The previous prime is 204768139708793. The next prime is 204768139708921. The reversal of 204768139708857 is 758807931867402.

204768139708857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (204768139708793) and next prime (204768139708921).

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

It is a cyclic number.

It is not a de Polignac number, because 204768139708857 - 2⁶ = 204768139708793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204768139708357) 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, 60457869 + ... + 63754922.

It is an arithmetic number, because the mean of its divisors is an integer number (34128085665960).

It is a 1-persistent number, because it is pandigital, but 2⋅204768139708857 = 409536279417714 is not.

Almost surely, 2^{204768139708857} is an apocalyptic number.

It is an amenable number.

204768139708857 is a deficient number, since it is larger than the sum of its proper divisors (68256545618823).

204768139708857 is a wasteful number, since it uses less digits than its factorization.

204768139708857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124762303.

The product of its (nonzero) digits is 1137991680, while the sum is 75.

The spelling of 204768139708857 in words is "two hundred four trillion, seven hundred sixty-eight billion, one hundred thirty-nine million, seven hundred eight thousand, eight hundred fifty-seven".