68159557230778 has 64 divisors (see below), whose sum is σ = 114828747264000. Its totient is φ = 30126110644224.

The previous prime is 68159557230767. The next prime is 68159557230841. The reversal of 68159557230778 is 87703275595186.

It is a self number, because there is not a number n which added to its sum of digits gives 68159557230778.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357943978 + ... + 358134346.

It is an arithmetic number, because the mean of its divisors is an integer number (1794199176000).

Almost surely, 2^{68159557230778} is an apocalyptic number.

68159557230778 is a deficient number, since it is larger than the sum of its proper divisors (46669190033222).

68159557230778 is a wasteful number, since it uses less digits than its factorization.

68159557230778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194279.

The product of its (nonzero) digits is 889056000, while the sum is 73.

The spelling of 68159557230778 in words is "sixty-eight trillion, one hundred fifty-nine billion, five hundred fifty-seven million, two hundred thirty thousand, seven hundred seventy-eight".