258017895640 has 16 divisors (see below), whose sum is σ = 580540265280. Its totient is φ = 103207158240.

The previous prime is 258017895637. The next prime is 258017895647. The reversal of 258017895640 is 46598710852.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258017895647) 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, 3225223656 + ... + 3225223735.

It is an arithmetic number, because the mean of its divisors is an integer number (36283766580).

Almost surely, 2^258017895640 is an apocalyptic number.

258017895640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258017895640 is an abundant number, since it is smaller than the sum of its proper divisors (322522369640).

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

258017895640 is a wasteful number, since it uses less digits than its factorization.

258017895640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6450447402 (or 6450447398 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 258017895640 in words is "two hundred fifty-eight billion, seventeen million, eight hundred ninety-five thousand, six hundred forty".