1220544400153 has 4 divisors (see below), whose sum is σ = 1314432430948. Its totient is φ = 1126656369360.

The previous prime is 1220544400147. The next prime is 1220544400189. The reversal of 1220544400153 is 3510044450221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 580237163289 + 640307236864 = 761733^2 + 800192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220544400153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220544400253) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 46944015378 + ... + 46944015403.

It is an arithmetic number, because the mean of its divisors is an integer number (328608107737).

Almost surely, 2^{1220544400153} is an apocalyptic number.

1220544400153 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1220544400153 is a deficient number, since it is larger than the sum of its proper divisors (93888030795).

1220544400153 is an equidigital number, since it uses as much as digits as its factorization.

1220544400153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93888030794.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 1220544400153 its reverse (3510044450221), we get a palindrome (4730588850374).

The spelling of 1220544400153 in words is "one trillion, two hundred twenty billion, five hundred forty-four million, four hundred thousand, one hundred fifty-three".