68998755 has 16 divisors (see below), whose sum is σ = 126169344. Its totient is φ = 31542240.

The previous prime is 68998751. The next prime is 68998793. The reversal of 68998755 is 55789986.

It is not a de Polignac number, because 68998755 - 2² = 68998751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68998695 and 68998704.

It is not an unprimeable number, because it can be changed into a prime (68998751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328461 + ... + 328670.

It is an arithmetic number, because the mean of its divisors is an integer number (7885584).

Almost surely, 2^68998755 is an apocalyptic number.

68998755 is a deficient number, since it is larger than the sum of its proper divisors (57170589).

68998755 is a wasteful number, since it uses less digits than its factorization.

68998755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657146.

The product of its digits is 5443200, while the sum is 57.

The square root of 68998755 is about 8306.5489223865. The cubic root of 68998755 is about 410.1541260715.

The spelling of 68998755 in words is "sixty-eight million, nine hundred ninety-eight thousand, seven hundred fifty-five".