68201578057 has 4 divisors (see below), whose sum is σ = 68216795920. Its totient is φ = 68186360196.

The previous prime is 68201578033. The next prime is 68201578099. The reversal of 68201578057 is 75087510286.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75087510286 = 2 ⋅37543755143.

It is a cyclic number.

It is not a de Polignac number, because 68201578057 - 2²⁷ = 68067360329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68201578057.

It is not an unprimeable number, because it can be changed into a prime (68201578957) 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 3 ways as a sum of consecutive naturals, for example, 7602207 + ... + 7611172.

It is an arithmetic number, because the mean of its divisors is an integer number (17054198980).

Almost surely, 2^68201578057 is an apocalyptic number.

It is an amenable number.

68201578057 is a deficient number, since it is larger than the sum of its proper divisors (15217863).

68201578057 is a wasteful number, since it uses less digits than its factorization.

68201578057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15217862.

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 68201578057 in words is "sixty-eight billion, two hundred one million, five hundred seventy-eight thousand, fifty-seven".