258905265085 has 4 divisors (see below), whose sum is σ = 310686318108. Its totient is φ = 207124212064.

The previous prime is 258905265079. The next prime is 258905265103. The reversal of 258905265085 is 580562509852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31821564996 + 227083700089 = 178386^2 + 476533^2 .

It is a cyclic number.

It is not a de Polignac number, because 258905265085 - 2³ = 258905265077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25890526504 + ... + 25890526513.

It is an arithmetic number, because the mean of its divisors is an integer number (77671579527).

Almost surely, 2^258905265085 is an apocalyptic number.

It is an amenable number.

258905265085 is a deficient number, since it is larger than the sum of its proper divisors (51781053023).

258905265085 is an equidigital number, since it uses as much as digits as its factorization.

258905265085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51781053022.

The product of its (nonzero) digits is 8640000, while the sum is 55.

The spelling of 258905265085 in words is "two hundred fifty-eight billion, nine hundred five million, two hundred sixty-five thousand, eighty-five".