171212775676451 has 2 divisors, whose sum is σ = 171212775676452. Its totient is φ = 171212775676450.

The previous prime is 171212775676429. The next prime is 171212775676513. The reversal of 171212775676451 is 154676577212171.

It is an a-pointer prime, because the next prime (171212775676513) can be obtained adding 171212775676451 to its sum of digits (62).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171212775676451 is a prime.

It is not a weakly prime, because it can be changed into another prime (171212775676651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85606387838225 + 85606387838226.

It is an arithmetic number, because the mean of its divisors is an integer number (85606387838226).

Almost surely, 2^{171212775676451} is an apocalyptic number.

171212775676451 is a deficient number, since it is larger than the sum of its proper divisors (1).

171212775676451 is an equidigital number, since it uses as much as digits as its factorization.

171212775676451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34574400, while the sum is 62.

The spelling of 171212775676451 in words is "one hundred seventy-one trillion, two hundred twelve billion, seven hundred seventy-five million, six hundred seventy-six thousand, four hundred fifty-one".