172106655101 has 2 divisors, whose sum is σ = 172106655102. Its totient is φ = 172106655100.

The previous prime is 172106655067. The next prime is 172106655137. The reversal of 172106655101 is 101556601271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103790287225 + 68316367876 = 322165^2 + 261374^2 .

It is a cyclic number.

It is not a de Polignac number, because 172106655101 - 2¹⁸ = 172106392957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172106655601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86053327550 + 86053327551.

It is an arithmetic number, because the mean of its divisors is an integer number (86053327551).

Almost surely, 2^172106655101 is an apocalyptic number.

It is an amenable number.

172106655101 is a deficient number, since it is larger than the sum of its proper divisors (1).

172106655101 is an equidigital number, since it uses as much as digits as its factorization.

172106655101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 35.

The spelling of 172106655101 in words is "one hundred seventy-two billion, one hundred six million, six hundred fifty-five thousand, one hundred one".