258557561868 has 24 divisors (see below), whose sum is σ = 603533715568. Its totient is φ = 86152605696.

The previous prime is 258557561849. The next prime is 258557561869. The reversal of 258557561868 is 868165755852.

It is a junction number, because it is equal to n+sod(n) for n = 258557561799 and 258557561808.

It is not an unprimeable number, because it can be changed into a prime (258557561869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4123621 + ... + 4185852.

Almost surely, 2^258557561868 is an apocalyptic number.

It is an amenable number.

258557561868 is an abundant number, since it is smaller than the sum of its proper divisors (344976153700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

258557561868 is a wasteful number, since it uses less digits than its factorization.

258557561868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8312073 (or 8312071 counting only the distinct ones).

The product of its digits is 161280000, while the sum is 66.

The spelling of 258557561868 in words is "two hundred fifty-eight billion, five hundred fifty-seven million, five hundred sixty-one thousand, eight hundred sixty-eight".