1220310653845 has 8 divisors (see below), whose sum is σ = 1466081509464. Its totient is φ = 975109373184.

The previous prime is 1220310653767. The next prime is 1220310653867. The reversal of 1220310653845 is 5483560130221.

It can be written as a sum of positive squares in 4 ways, for example, as 507824413924 + 712486239921 = 712618^2 + 844089^2 .

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 1220310653845 - 2²⁷ = 1220176436117 is a prime.

It is a super-2 number, since 2×1220310653845² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220310653798 and 1220310653807.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 142389024 + ... + 142397593.

It is an arithmetic number, because the mean of its divisors is an integer number (183260188683).

Almost surely, 2^{1220310653845} is an apocalyptic number.

It is an amenable number.

1220310653845 is a deficient number, since it is larger than the sum of its proper divisors (245770855619).

1220310653845 is an equidigital number, since it uses as much as digits as its factorization.

1220310653845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284787479.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 1220310653845 in words is "one trillion, two hundred twenty billion, three hundred ten million, six hundred fifty-three thousand, eight hundred forty-five".