251894844472289 has 2 divisors, whose sum is σ = 251894844472290. Its totient is φ = 251894844472288.

The previous prime is 251894844472283. The next prime is 251894844472379. The reversal of 251894844472289 is 982274448498152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141201720105889 + 110693124366400 = 11882833^2 + 10521080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251894844472289 is a prime.

It is not a weakly prime, because it can be changed into another prime (251894844472283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125947422236144 + 125947422236145.

It is an arithmetic number, because the mean of its divisors is an integer number (125947422236145).

Almost surely, 2^{251894844472289} is an apocalyptic number.

It is an amenable number.

251894844472289 is a deficient number, since it is larger than the sum of its proper divisors (1).

251894844472289 is an equidigital number, since it uses as much as digits as its factorization.

251894844472289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2972712960, while the sum is 77.

The spelling of 251894844472289 in words is "two hundred fifty-one trillion, eight hundred ninety-four billion, eight hundred forty-four million, four hundred seventy-two thousand, two hundred eighty-nine".