68178294154 has 4 divisors (see below), whose sum is σ = 102267441234. Its totient is φ = 34089147076.

The previous prime is 68178294139. The next prime is 68178294167. The reversal of 68178294154 is 45149287186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38956101129 + 29222193025 = 197373^2 + 170945^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68178294095 and 68178294104.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17044573537 + ... + 17044573540.

Almost surely, 2^68178294154 is an apocalyptic number.

68178294154 is a deficient number, since it is larger than the sum of its proper divisors (34089147080).

68178294154 is a wasteful number, since it uses less digits than its factorization.

68178294154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34089147079.

The product of its digits is 3870720, while the sum is 55.

The spelling of 68178294154 in words is "sixty-eight billion, one hundred seventy-eight million, two hundred ninety-four thousand, one hundred fifty-four".