1220631445663 has 4 divisors (see below), whose sum is σ = 1395007366480. Its totient is φ = 1046255524848.

The previous prime is 1220631445651. The next prime is 1220631445669. The reversal of 1220631445663 is 3665441360221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1220631445663 - 2⁹ = 1220631445151 is a prime.

It is a super-2 number, since 2×1220631445663² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220631445669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87187960398 + ... + 87187960411.

It is an arithmetic number, because the mean of its divisors is an integer number (348751841620).

Almost surely, 2^{1220631445663} is an apocalyptic number.

1220631445663 is a deficient number, since it is larger than the sum of its proper divisors (174375920817).

1220631445663 is an equidigital number, since it uses as much as digits as its factorization.

1220631445663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174375920816.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 1220631445663 in words is "one trillion, two hundred twenty billion, six hundred thirty-one million, four hundred forty-five thousand, six hundred sixty-three".