1022128856845 has 8 divisors (see below), whose sum is σ = 1231327215864. Its totient is φ = 814521360384.

The previous prime is 1022128856839. The next prime is 1022128856869. The reversal of 1022128856845 is 5486588212201.

It can be written as a sum of positive squares in 4 ways, for example, as 153240148681 + 868888708164 = 391459^2 + 932142^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1022128856845 - 2⁷ = 1022128856717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022128856792 and 1022128856801.

It is a congruent number.

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, 397714224 + ... + 397716793.

It is an arithmetic number, because the mean of its divisors is an integer number (153915901983).

Almost surely, 2^{1022128856845} is an apocalyptic number.

It is an amenable number.

1022128856845 is a deficient number, since it is larger than the sum of its proper divisors (209198359019).

1022128856845 is an equidigital number, since it uses as much as digits as its factorization.

1022128856845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795431279.

The product of its (nonzero) digits is 2457600, while the sum is 52.

The spelling of 1022128856845 in words is "one trillion, twenty-two billion, one hundred twenty-eight million, eight hundred fifty-six thousand, eight hundred forty-five".