1022207785685 has 4 divisors (see below), whose sum is σ = 1226649342828. Its totient is φ = 817766228544.

The previous prime is 1022207785609. The next prime is 1022207785777. The reversal of 1022207785685 is 5865877022201.

1022207785685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 559207831204 + 462999954481 = 747802^2 + 680441^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022207785685 - 2³⁸ = 747329878741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102220778564 + ... + 102220778573.

It is an arithmetic number, because the mean of its divisors is an integer number (306662335707).

Almost surely, 2^{1022207785685} is an apocalyptic number.

It is an amenable number.

1022207785685 is a deficient number, since it is larger than the sum of its proper divisors (204441557143).

1022207785685 is an equidigital number, since it uses as much as digits as its factorization.

1022207785685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204441557142.

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 1022207785685 in words is "one trillion, twenty-two billion, two hundred seven million, seven hundred eighty-five thousand, six hundred eighty-five".