258595815421 has 16 divisors (see below), whose sum is σ = 261545656320. Its totient is φ = 255661766640.

The previous prime is 258595815397. The next prime is 258595815431. The reversal of 258595815421 is 124518595852.

It is a cyclic number.

It is not a de Polignac number, because 258595815421 - 2⁵ = 258595815389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258595815431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56869470 + ... + 56874016.

It is an arithmetic number, because the mean of its divisors is an integer number (16346603520).

Almost surely, 2^258595815421 is an apocalyptic number.

It is an amenable number.

258595815421 is a deficient number, since it is larger than the sum of its proper divisors (2949840899).

258595815421 is a wasteful number, since it uses less digits than its factorization.

258595815421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6144.

The product of its digits is 5760000, while the sum is 55.

The spelling of 258595815421 in words is "two hundred fifty-eight billion, five hundred ninety-five million, eight hundred fifteen thousand, four hundred twenty-one".