1220553707188 has 6 divisors (see below), whose sum is σ = 2135968987586. Its totient is φ = 610276853592.

The previous prime is 1220553707183. The next prime is 1220553707189. The reversal of 1220553707188 is 8817073550221.

It can be written as a sum of positive squares in only one way, i.e., 1037256697764 + 183297009424 = 1018458^2 + 428132^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220553707183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152569213395 + ... + 152569213402.

Almost surely, 2^{1220553707188} is an apocalyptic number.

It is an amenable number.

1220553707188 is a deficient number, since it is larger than the sum of its proper divisors (915415280398).

1220553707188 is a wasteful number, since it uses less digits than its factorization.

1220553707188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305138426801 (or 305138426799 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 1220553707188 in words is "one trillion, two hundred twenty billion, five hundred fifty-three million, seven hundred seven thousand, one hundred eighty-eight".