258535780081 has 4 divisors (see below), whose sum is σ = 258935372352. Its totient is φ = 258136187812.

The previous prime is 258535780073. The next prime is 258535780091. The reversal of 258535780081 is 180087535852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 258535780081 - 2³ = 258535780073 is a prime.

It is a super-2 number, since 2×258535780081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258535780091) 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, 199795165 + ... + 199796458.

It is an arithmetic number, because the mean of its divisors is an integer number (64733843088).

Almost surely, 2^258535780081 is an apocalyptic number.

It is an amenable number.

258535780081 is a deficient number, since it is larger than the sum of its proper divisors (399592271).

258535780081 is an equidigital number, since it uses as much as digits as its factorization.

258535780081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399592270.

The product of its (nonzero) digits is 2688000, while the sum is 52.

The spelling of 258535780081 in words is "two hundred fifty-eight billion, five hundred thirty-five million, seven hundred eighty thousand, eighty-one".