68536144478 has 8 divisors (see below), whose sum is σ = 102882877272. Its totient is φ = 34241852056.

The previous prime is 68536144477. The next prime is 68536144493. The reversal of 68536144478 is 87444163586.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68536144477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13106825 + ... + 13112052.

It is an arithmetic number, because the mean of its divisors is an integer number (12860359659).

Almost surely, 2^68536144478 is an apocalyptic number.

68536144478 is a deficient number, since it is larger than the sum of its proper divisors (34346732794).

68536144478 is a wasteful number, since it uses less digits than its factorization.

68536144478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26220186.

The product of its digits is 15482880, while the sum is 56.

The spelling of 68536144478 in words is "sixty-eight billion, five hundred thirty-six million, one hundred forty-four thousand, four hundred seventy-eight".