68538028905755 has 64 divisors (see below), whose sum is σ = 89395223063040. Its totient is φ = 50325503606784.

The previous prime is 68538028905751. The next prime is 68538028905767. The reversal of 68538028905755 is 55750982083586.

It is a cyclic number.

It is not a de Polignac number, because 68538028905755 - 2² = 68538028905751 is a prime.

It is a super-2 number, since 2×68538028905755² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68538028905751) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 145257899 + ... + 145728971.

It is an arithmetic number, because the mean of its divisors is an integer number (1396800360360).

Almost surely, 2^{68538028905755} is an apocalyptic number.

68538028905755 is a deficient number, since it is larger than the sum of its proper divisors (20857194157285).

68538028905755 is a wasteful number, since it uses less digits than its factorization.

68538028905755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471768.

The product of its (nonzero) digits is 725760000, while the sum is 71.

The spelling of 68538028905755 in words is "sixty-eight trillion, five hundred thirty-eight billion, twenty-eight million, nine hundred five thousand, seven hundred fifty-five".