1220544052445 has 128 divisors (see below), whose sum is σ = 1662675517440. Its totient is φ = 855770572800.

The previous prime is 1220544052433. The next prime is 1220544052447. The reversal of 1220544052445 is 5442504450221.

It is not a de Polignac number, because 1220544052445 - 2⁶ = 1220544052381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220544052399 and 1220544052408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220544052447) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3899501609 + ... + 3899501921.

It is an arithmetic number, because the mean of its divisors is an integer number (12989652480).

Almost surely, 2^{1220544052445} is an apocalyptic number.

It is an amenable number.

1220544052445 is a deficient number, since it is larger than the sum of its proper divisors (442131464995).

1220544052445 is a wasteful number, since it uses less digits than its factorization.

1220544052445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787.

The product of its (nonzero) digits is 256000, while the sum is 38.

The spelling of 1220544052445 in words is "one trillion, two hundred twenty billion, five hundred forty-four million, fifty-two thousand, four hundred forty-five".