1220145176444 has 24 divisors (see below), whose sum is σ = 2157469643280. Its totient is φ = 603726460416.

The previous prime is 1220145176423. The next prime is 1220145176447. The reversal of 1220145176444 is 4446715410221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220145176447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4148714 + ... + 4433070.

It is an arithmetic number, because the mean of its divisors is an integer number (89894568470).

Almost surely, 2^{1220145176444} is an apocalyptic number.

It is an amenable number.

1220145176444 is a deficient number, since it is larger than the sum of its proper divisors (937324466836).

1220145176444 is a wasteful number, since it uses less digits than its factorization.

1220145176444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295517 (or 295515 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 1220145176444 in words is "one trillion, two hundred twenty billion, one hundred forty-five million, one hundred seventy-six thousand, four hundred forty-four".