68461547138 has 8 divisors (see below), whose sum is σ = 107157204288. Its totient is φ = 32742479044.

The previous prime is 68461547123. The next prime is 68461547191. The reversal of 68461547138 is 83174516486.

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

It is a self number, because there is not a number n which added to its sum of digits gives 68461547138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744147206 + ... + 744147297.

It is an arithmetic number, because the mean of its divisors is an integer number (13394650536).

Almost surely, 2^68461547138 is an apocalyptic number.

68461547138 is a deficient number, since it is larger than the sum of its proper divisors (38695657150).

68461547138 is a wasteful number, since it uses less digits than its factorization.

68461547138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488294528.

The product of its digits is 3870720, while the sum is 53.

The spelling of 68461547138 in words is "sixty-eight billion, four hundred sixty-one million, five hundred forty-seven thousand, one hundred thirty-eight".