1220545505344 has 56 divisors (see below), whose sum is σ = 2797627392288. Its totient is φ = 522158499840.

The previous prime is 1220545505321. The next prime is 1220545505359. The reversal of 1220545505344 is 4435055450221.

It is a junction number, because it is equal to n+sod(n) for n = 1220545505297 and 1220545505306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50980074 + ... + 51004009.

Almost surely, 2^{1220545505344} is an apocalyptic number.

It is an amenable number.

1220545505344 is an abundant number, since it is smaller than the sum of its proper divisors (1577081886944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220545505344 is a wasteful number, since it uses less digits than its factorization.

1220545505344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101984123 (or 101984113 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 40.

The spelling of 1220545505344 in words is "one trillion, two hundred twenty billion, five hundred forty-five million, five hundred five thousand, three hundred forty-four".