1028158745858 has 8 divisors (see below), whose sum is σ = 1542268601100. Its totient is φ = 514069212160.

The previous prime is 1028158745849. The next prime is 1028158745917. The reversal of 1028158745858 is 8585478518201.

It can be written as a sum of positive squares in 2 ways, for example, as 1020013141849 + 8145604009 = 1009957^2 + 90253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1028158745858² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1028158745858.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4953263 + ... + 5156658.

Almost surely, 2^{1028158745858} is an apocalyptic number.

1028158745858 is a deficient number, since it is larger than the sum of its proper divisors (514109855242).

1028158745858 is a wasteful number, since it uses less digits than its factorization.

1028158745858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10160772.

The product of its (nonzero) digits is 28672000, while the sum is 62.

The spelling of 1028158745858 in words is "one trillion, twenty-eight billion, one hundred fifty-eight million, seven hundred forty-five thousand, eight hundred fifty-eight".