1220305375653 has 64 divisors (see below), whose sum is σ = 2057409779712. Its totient is φ = 626057268480.

The previous prime is 1220305375643. The next prime is 1220305375753. The reversal of 1220305375653 is 3565735030221.

It is not a de Polignac number, because 1220305375653 - 2¹⁴ = 1220305359269 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220305375633) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30394050 + ... + 30434172.

It is an arithmetic number, because the mean of its divisors is an integer number (32147027808).

Almost surely, 2^{1220305375653} is an apocalyptic number.

1220305375653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1220305375653 is a deficient number, since it is larger than the sum of its proper divisors (837104404059).

1220305375653 is a wasteful number, since it uses less digits than its factorization.

1220305375653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43194.

The product of its (nonzero) digits is 567000, while the sum is 42.

The spelling of 1220305375653 in words is "one trillion, two hundred twenty billion, three hundred five million, three hundred seventy-five thousand, six hundred fifty-three".