1022207785665 has 64 divisors (see below), whose sum is σ = 1907876374272. Its totient is φ = 461843456000.

The previous prime is 1022207785609. The next prime is 1022207785777. The reversal of 1022207785665 is 5665877022201.

It is not a de Polignac number, because 1022207785665 - 2⁹ = 1022207785153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1520772 + ... + 2087381.

It is an arithmetic number, because the mean of its divisors is an integer number (29810568348).

Almost surely, 2^{1022207785665} is an apocalyptic number.

1022207785665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1022207785665 is a deficient number, since it is larger than the sum of its proper divisors (885668588607).

1022207785665 is a wasteful number, since it uses less digits than its factorization.

1022207785665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3608290.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 1022207785665 in words is "one trillion, twenty-two billion, two hundred seven million, seven hundred eighty-five thousand, six hundred sixty-five".