68839477449 has 8 divisors (see below), whose sum is σ = 91926532992. Its totient is φ = 45822703440.

The previous prime is 68839477439. The next prime is 68839477631. The reversal of 68839477449 is 94477493886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68839477449 - 2¹⁶ = 68839411913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68839477409) 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 7 ways as a sum of consecutive naturals, for example, 17568097 + ... + 17572014.

It is an arithmetic number, because the mean of its divisors is an integer number (11490816624).

Almost surely, 2^68839477449 is an apocalyptic number.

It is an amenable number.

68839477449 is a deficient number, since it is larger than the sum of its proper divisors (23087055543).

68839477449 is a wasteful number, since it uses less digits than its factorization.

68839477449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35140767.

The product of its digits is 292626432, while the sum is 69.

The spelling of 68839477449 in words is "sixty-eight billion, eight hundred thirty-nine million, four hundred seventy-seven thousand, four hundred forty-nine".