258135898656 has 48 divisors (see below), whose sum is σ = 678632024448. Its totient is φ = 85915104000.

The previous prime is 258135898639. The next prime is 258135898697. The reversal of 258135898656 is 656898531852.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1970520 + ... + 2097431.

It is an arithmetic number, because the mean of its divisors is an integer number (14138167176).

Almost surely, 2^258135898656 is an apocalyptic number.

It is an amenable number.

258135898656 is an abundant number, since it is smaller than the sum of its proper divisors (420496125792).

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

258135898656 is a wasteful number, since it uses less digits than its factorization.

258135898656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068625 (or 4068617 counting only the distinct ones).

The product of its digits is 124416000, while the sum is 66.

The spelling of 258135898656 in words is "two hundred fifty-eight billion, one hundred thirty-five million, eight hundred ninety-eight thousand, six hundred fifty-six".