68628722923 has 8 divisors (see below), whose sum is σ = 71012098080. Its totient is φ = 66246472320.

The previous prime is 68628722861. The next prime is 68628722927. The reversal of 68628722923 is 32922782686.

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

It is a cyclic number.

It is not a de Polignac number, because 68628722923 - 2⁹ = 68628722411 is a prime.

It is a super-2 number, since 2×68628722923² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68628722927) 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, 156015 + ... + 401992.

It is an arithmetic number, because the mean of its divisors is an integer number (8876512260).

Almost surely, 2^68628722923 is an apocalyptic number.

68628722923 is a deficient number, since it is larger than the sum of its proper divisors (2383375157).

68628722923 is a wasteful number, since it uses less digits than its factorization.

68628722923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562277.

The product of its digits is 6967296, while the sum is 55.

The spelling of 68628722923 in words is "sixty-eight billion, six hundred twenty-eight million, seven hundred twenty-two thousand, nine hundred twenty-three".