259387012549 has 12 divisors (see below), whose sum is σ = 301744448364. Its totient is φ = 222325435584.

The previous prime is 259387012523. The next prime is 259387012579. The reversal of 259387012549 is 945210783952.

It can be written as a sum of positive squares in 2 ways, for example, as 135437248324 + 123949764225 = 368018^2 + 352065^2 .

It is not a de Polignac number, because 259387012549 - 2²¹ = 259384915397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 259387012549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259387012579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2756179 + ... + 2848735.

It is an arithmetic number, because the mean of its divisors is an integer number (25145370697).

Almost surely, 2^259387012549 is an apocalyptic number.

It is an amenable number.

259387012549 is a deficient number, since it is larger than the sum of its proper divisors (42357435815).

259387012549 is an equidigital number, since it uses as much as digits as its factorization.

259387012549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149764 (or 149757 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 259387012549 in words is "two hundred fifty-nine billion, three hundred eighty-seven million, twelve thousand, five hundred forty-nine".