3555521440656 has 40 divisors (see below), whose sum is σ = 9219242430720. Its totient is φ = 1180767958656.

The previous prime is 3555521440649. The next prime is 3555521440673. The reversal of 3555521440656 is 6560441255553.

It is a junction number, because it is equal to n+sod(n) for n = 3555521440599 and 3555521440608.

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, 137669920 + ... + 137695743.

It is an arithmetic number, because the mean of its divisors is an integer number (230481060768).

Almost surely, 2^{3555521440656} is an apocalyptic number.

It is an amenable number.

3555521440656 is an abundant number, since it is smaller than the sum of its proper divisors (5663720990064).

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

3555521440656 is a wasteful number, since it uses less digits than its factorization.

3555521440656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275365943 (or 275365937 counting only the distinct ones).

The product of its (nonzero) digits is 10800000, while the sum is 51.

The spelling of 3555521440656 in words is "three trillion, five hundred fifty-five billion, five hundred twenty-one million, four hundred forty thousand, six hundred fifty-six".