258754399781 has 2 divisors, whose sum is σ = 258754399782. Its totient is φ = 258754399780.

The previous prime is 258754399777. The next prime is 258754399807. The reversal of 258754399781 is 187993457852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257090575681 + 1663824100 = 507041^2 + 40790^2 .

It is a cyclic number.

It is not a de Polignac number, because 258754399781 - 2² = 258754399777 is a prime.

It is a super-2 number, since 2×258754399781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258454399781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129377199890 + 129377199891.

It is an arithmetic number, because the mean of its divisors is an integer number (129377199891).

Almost surely, 2^258754399781 is an apocalyptic number.

It is an amenable number.

258754399781 is a deficient number, since it is larger than the sum of its proper divisors (1).

258754399781 is an equidigital number, since it uses as much as digits as its factorization.

258754399781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 152409600, while the sum is 68.

The spelling of 258754399781 in words is "two hundred fifty-eight billion, seven hundred fifty-four million, three hundred ninety-nine thousand, seven hundred eighty-one".