68151128878 has 32 divisors (see below), whose sum is σ = 124029446400. Its totient is φ = 27416962944.

The previous prime is 68151128867. The next prime is 68151128971. The reversal of 68151128878 is 87882115186.

It is a congruent number.

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, 287568 + ... + 467971.

It is an arithmetic number, because the mean of its divisors is an integer number (3875920200).

Almost surely, 2^68151128878 is an apocalyptic number.

68151128878 is a deficient number, since it is larger than the sum of its proper divisors (55878317522).

68151128878 is a wasteful number, since it uses less digits than its factorization.

68151128878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755944.

The product of its digits is 1720320, while the sum is 55.

The spelling of 68151128878 in words is "sixty-eight billion, one hundred fifty-one million, one hundred twenty-eight thousand, eight hundred seventy-eight".