68046963978 has 32 divisors (see below), whose sum is σ = 155701296000. Its totient is φ = 19421317440.

The previous prime is 68046963961. The next prime is 68046963991. The reversal of 68046963978 is 87936964086.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821353 + ... + 900396.

It is an arithmetic number, because the mean of its divisors is an integer number (4865665500).

Almost surely, 2^68046963978 is an apocalyptic number.

68046963978 is an abundant number, since it is smaller than the sum of its proper divisors (87654332022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68046963978 is a wasteful number, since it uses less digits than its factorization.

68046963978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722702.

The product of its (nonzero) digits is 94058496, while the sum is 66.

It can be divided in two parts, 680469 and 63978, that added together give a palindrome (744447).

The spelling of 68046963978 in words is "sixty-eight billion, forty-six million, nine hundred sixty-three thousand, nine hundred seventy-eight".