254642622197 has 2 divisors, whose sum is σ = 254642622198. Its totient is φ = 254642622196.

The previous prime is 254642622191. The next prime is 254642622259. The reversal of 254642622197 is 791226246452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238260158161 + 16382464036 = 488119^2 + 127994^2 .

It is a cyclic number.

It is not a de Polignac number, because 254642622197 - 2⁶ = 254642622133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254642622191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127321311098 + 127321311099.

It is an arithmetic number, because the mean of its divisors is an integer number (127321311099).

Almost surely, 2^254642622197 is an apocalyptic number.

It is an amenable number.

254642622197 is a deficient number, since it is larger than the sum of its proper divisors (1).

254642622197 is an equidigital number, since it uses as much as digits as its factorization.

254642622197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 50.

The spelling of 254642622197 in words is "two hundred fifty-four billion, six hundred forty-two million, six hundred twenty-two thousand, one hundred ninety-seven".