258023791567 has 4 divisors (see below), whose sum is σ = 266921163720. Its totient is φ = 249126419416.

The previous prime is 258023791477. The next prime is 258023791643. The reversal of 258023791567 is 765197320852.

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

It is a cyclic number.

It is not a de Polignac number, because 258023791567 - 2¹⁹ = 258023267279 is a prime.

It is a super-2 number, since 2×258023791567² (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 (258023291567) 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, 4448686033 + ... + 4448686090.

It is an arithmetic number, because the mean of its divisors is an integer number (66730290930).

Almost surely, 2^258023791567 is an apocalyptic number.

258023791567 is a deficient number, since it is larger than the sum of its proper divisors (8897372153).

258023791567 is an equidigital number, since it uses as much as digits as its factorization.

258023791567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8897372152.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 258023791567 in words is "two hundred fifty-eight billion, twenty-three million, seven hundred ninety-one thousand, five hundred sixty-seven".