68399399523 has 32 divisors (see below), whose sum is σ = 113129046016. Its totient is φ = 35794700928.

The previous prime is 68399399501. The next prime is 68399399557. The reversal of 68399399523 is 32599399386.

It is not a de Polignac number, because 68399399523 - 2¹⁴ = 68399383139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68399399023) 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 31 ways as a sum of consecutive naturals, for example, 951736 + ... + 1021077.

It is an arithmetic number, because the mean of its divisors is an integer number (3535282688).

Almost surely, 2^68399399523 is an apocalyptic number.

68399399523 is a deficient number, since it is larger than the sum of its proper divisors (44729646493).

68399399523 is a wasteful number, since it uses less digits than its factorization.

68399399523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972963.

The product of its digits is 85030560, while the sum is 66.

The spelling of 68399399523 in words is "sixty-eight billion, three hundred ninety-nine million, three hundred ninety-nine thousand, five hundred twenty-three".