1220544052447 has 2 divisors, whose sum is σ = 1220544052448. Its totient is φ = 1220544052446.

The previous prime is 1220544052433. The next prime is 1220544052547. The reversal of 1220544052447 is 7442504450221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220544052447 - 2¹⁵ = 1220544019679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220544052547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610272026223 + 610272026224.

It is an arithmetic number, because the mean of its divisors is an integer number (610272026224).

Almost surely, 2^{1220544052447} is an apocalyptic number.

1220544052447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220544052447 is an equidigital number, since it uses as much as digits as its factorization.

1220544052447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 358400, while the sum is 40.

The spelling of 1220544052447 in words is "one trillion, two hundred twenty billion, five hundred forty-four million, fifty-two thousand, four hundred forty-seven".