258051649 has 4 divisors (see below), whose sum is σ = 258084036.
Its totient is φ = 258019264.
The previous prime is 258051641. The next prime is 258051707. The reversal of 258051649 is 946150852.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in 2 ways, for example, as 131331600 + 126720049 = 11460^2 + 11257^2
It is a cyclic number.
It is not a de Polignac number, because 258051649 - 23 = 258051641 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (258051641) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5037 + ... + 23269.
It is an arithmetic number, because the mean of its divisors is an integer number (64521009).
It is a 7968-hyperperfect number.
Almost surely, 2258051649 is an apocalyptic number.
It is an amenable number.
258051649 is a deficient number, since it is larger than the sum of its proper divisors (32387).
258051649 is a wasteful number, since it uses less digits than its factorization.
258051649 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 32386.
The product of its (nonzero) digits is 86400, while the sum is 40.
The square root of 258051649 is about 16063.9860868964.
The cubic root of 258051649 is about 636.6521541545.
The spelling of 258051649 in words is "two hundred fifty-eight million, fifty-one thousand, six hundred forty-nine".