68478238631 has 8 divisors (see below), whose sum is σ = 75473673744. Its totient is φ = 61611160320.

The previous prime is 68478238627. The next prime is 68478238639. The reversal of 68478238631 is 13683287486.

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

It is a cyclic number.

It is not a de Polignac number, because 68478238631 - 2² = 68478238627 is a prime.

It is a super-3 number, since 3×68478238631³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68478238639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32088080 + ... + 32090213.

It is an arithmetic number, because the mean of its divisors is an integer number (9434209218).

Almost surely, 2^68478238631 is an apocalyptic number.

68478238631 is a deficient number, since it is larger than the sum of its proper divisors (6995435113).

68478238631 is a wasteful number, since it uses less digits than its factorization.

68478238631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64178401.

The product of its digits is 9289728, while the sum is 56.

The spelling of 68478238631 in words is "sixty-eight billion, four hundred seventy-eight million, two hundred thirty-eight thousand, six hundred thirty-one".