68172405503 has 2 divisors, whose sum is σ = 68172405504. Its totient is φ = 68172405502.

The previous prime is 68172405419. The next prime is 68172405529. The reversal of 68172405503 is 30550427186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68172405503 - 2¹⁰ = 68172404479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68172405533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34086202751 + 34086202752.

It is an arithmetic number, because the mean of its divisors is an integer number (34086202752).

Almost surely, 2^68172405503 is an apocalyptic number.

68172405503 is a deficient number, since it is larger than the sum of its proper divisors (1).

68172405503 is an equidigital number, since it uses as much as digits as its factorization.

68172405503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 68172405503 in words is "sixty-eight billion, one hundred seventy-two million, four hundred five thousand, five hundred three".