68978134821 has 8 divisors (see below), whose sum is σ = 92062000960. Its totient is φ = 45939845952.

The previous prime is 68978134777. The next prime is 68978134837. The reversal of 68978134821 is 12843187986.

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

It is not a de Polignac number, because 68978134821 - 2¹⁰ = 68978133797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68978134891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11390785 + ... + 11396838.

It is an arithmetic number, because the mean of its divisors is an integer number (11507750120).

Almost surely, 2^68978134821 is an apocalyptic number.

It is an amenable number.

68978134821 is a deficient number, since it is larger than the sum of its proper divisors (23083866139).

68978134821 is a wasteful number, since it uses less digits than its factorization.

68978134821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22788635.

The product of its digits is 4644864, while the sum is 57.

The spelling of 68978134821 in words is "sixty-eight billion, nine hundred seventy-eight million, one hundred thirty-four thousand, eight hundred twenty-one".