68870187978 has 8 divisors (see below), whose sum is σ = 137740375968. Its totient is φ = 22956729324.

The previous prime is 68870187973. The next prime is 68870188067. The reversal of 68870187978 is 87978107886.

It is a sphenic number, since it is the product of 3 distinct primes.

68870187978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (68870187973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5739182326 + ... + 5739182337.

It is an arithmetic number, because the mean of its divisors is an integer number (17217546996).

Almost surely, 2^68870187978 is an apocalyptic number.

68870187978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

68870187978 is a wasteful number, since it uses less digits than its factorization.

68870187978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11478364668.

The product of its (nonzero) digits is 75866112, while the sum is 69.

The spelling of 68870187978 in words is "sixty-eight billion, eight hundred seventy million, one hundred eighty-seven thousand, nine hundred seventy-eight".