210144240402457 has 2 divisors, whose sum is σ = 210144240402458. Its totient is φ = 210144240402456.

The previous prime is 210144240402389. The next prime is 210144240402487. The reversal of 210144240402457 is 754204042441012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151851794169856 + 58292446232601 = 12322816^2 + 7634949^2 .

It is a cyclic number.

It is not a de Polignac number, because 210144240402457 - 2¹⁵ = 210144240369689 is a prime.

It is not a weakly prime, because it can be changed into another prime (210144240402487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105072120201228 + 105072120201229.

It is an arithmetic number, because the mean of its divisors is an integer number (105072120201229).

Almost surely, 2^{210144240402457} is an apocalyptic number.

It is an amenable number.

210144240402457 is a deficient number, since it is larger than the sum of its proper divisors (1).

210144240402457 is an equidigital number, since it uses as much as digits as its factorization.

210144240402457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 286720, while the sum is 40.

Adding to 210144240402457 its reverse (754204042441012), we get a palindrome (964348282843469).

The spelling of 210144240402457 in words is "two hundred ten trillion, one hundred forty-four billion, two hundred forty million, four hundred two thousand, four hundred fifty-seven".