68138132398 has 64 divisors (see below), whose sum is σ = 119235916800. Its totient is φ = 28603176192.

The previous prime is 68138132389. The next prime is 68138132399. The reversal of 68138132398 is 89323183186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68138132399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65960890 + ... + 65961922.

It is an arithmetic number, because the mean of its divisors is an integer number (1863061200).

Almost surely, 2^68138132398 is an apocalyptic number.

68138132398 is a deficient number, since it is larger than the sum of its proper divisors (51097784402).

68138132398 is a wasteful number, since it uses less digits than its factorization.

68138132398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601.

The product of its digits is 1492992, while the sum is 52.

The spelling of 68138132398 in words is "sixty-eight billion, one hundred thirty-eight million, one hundred thirty-two thousand, three hundred ninety-eight".