68172453157 has 8 divisors (see below), whose sum is σ = 68228969600. Its totient is φ = 68115963744.

The previous prime is 68172453109. The next prime is 68172453161. The reversal of 68172453157 is 75135427186.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68172453157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68172453157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68172453197) 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, 11793694 + ... + 11799472.

It is an arithmetic number, because the mean of its divisors is an integer number (8528621200).

Almost surely, 2^68172453157 is an apocalyptic number.

It is an amenable number.

68172453157 is a deficient number, since it is larger than the sum of its proper divisors (56516443).

68172453157 is a wasteful number, since it uses less digits than its factorization.

68172453157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13515.

The product of its digits is 1411200, while the sum is 49.

The spelling of 68172453157 in words is "sixty-eight billion, one hundred seventy-two million, four hundred fifty-three thousand, one hundred fifty-seven".