68311478 has 4 divisors (see below), whose sum is σ = 102467220. Its totient is φ = 34155738.

The previous prime is 68311459. The next prime is 68311487. The reversal of 68311478 is 87411386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87411386 = 2 ⋅43705693.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17077868 + ... + 17077871.

It is an arithmetic number, because the mean of its divisors is an integer number (25616805).

Almost surely, 2^68311478 is an apocalyptic number.

68311478 is a deficient number, since it is larger than the sum of its proper divisors (34155742).

68311478 is a wasteful number, since it uses less digits than its factorization.

68311478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34155741.

The product of its digits is 32256, while the sum is 38.

The square root of 68311478 is about 8265.0758012253. The cubic root of 68311478 is about 408.7877697675.

The spelling of 68311478 in words is "sixty-eight million, three hundred eleven thousand, four hundred seventy-eight".