258138587115 has 24 divisors (see below), whose sum is σ = 447456675120. Its totient is φ = 137668849344.

The previous prime is 258138587101. The next prime is 258138587131. The reversal of 258138587115 is 511785831852.

258138587115 is a `hidden beast` number, since 2 + 58 + 1 + 3 + 8 + 587 + 1 + 1 + 5 = 666.

It is not a de Polignac number, because 258138587115 - 2¹⁵ = 258138554347 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1353189 + ... + 1532121.

It is an arithmetic number, because the mean of its divisors is an integer number (18644028130).

Almost surely, 2^258138587115 is an apocalyptic number.

258138587115 is a deficient number, since it is larger than the sum of its proper divisors (189318088005).

258138587115 is a wasteful number, since it uses less digits than its factorization.

258138587115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211003 (or 211000 counting only the distinct ones).

The product of its digits is 2688000, while the sum is 54.

The spelling of 258138587115 in words is "two hundred fifty-eight billion, one hundred thirty-eight million, five hundred eighty-seven thousand, one hundred fifteen".