172646204953 has 2 divisors, whose sum is σ = 172646204954. Its totient is φ = 172646204952.

The previous prime is 172646204909. The next prime is 172646204959. The reversal of 172646204953 is 359402646271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166727672329 + 5918532624 = 408323^2 + 76932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172646204953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172646204897 and 172646204906.

It is not a weakly prime, because it can be changed into another prime (172646204959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86323102476 + 86323102477.

It is an arithmetic number, because the mean of its divisors is an integer number (86323102477).

Almost surely, 2^172646204953 is an apocalyptic number.

It is an amenable number.

172646204953 is a deficient number, since it is larger than the sum of its proper divisors (1).

172646204953 is an equidigital number, since it uses as much as digits as its factorization.

172646204953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 172646204953 in words is "one hundred seventy-two billion, six hundred forty-six million, two hundred four thousand, nine hundred fifty-three".