258421901789 has 4 divisors (see below), whose sum is σ = 258426729756. Its totient is φ = 258417073824.

The previous prime is 258421901783. The next prime is 258421901819. The reversal of 258421901789 is 987109124852.

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 43788910564 + 214632991225 = 209258^2 + 463285^2 .

It is a cyclic number.

It is not a de Polignac number, because 258421901789 - 2²⁰ = 258420853213 is a prime.

It is a super-2 number, since 2×258421901789² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258421901783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2332784 + ... + 2441049.

It is an arithmetic number, because the mean of its divisors is an integer number (64606682439).

Almost surely, 2^258421901789 is an apocalyptic number.

It is an amenable number.

258421901789 is a deficient number, since it is larger than the sum of its proper divisors (4827967).

258421901789 is an equidigital number, since it uses as much as digits as its factorization.

258421901789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4827966.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 258421901789 in words is "two hundred fifty-eight billion, four hundred twenty-one million, nine hundred one thousand, seven hundred eighty-nine".