355220320122440 has 64 divisors (see below), whose sum is σ = 799414354728000. Its totient is φ = 142058151210240.

The previous prime is 355220320122433. The next prime is 355220320122461. The reversal of 355220320122440 is 44221023022553.

It is a self number, because there is not a number n which added to its sum of digits gives 355220320122440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8182704335 + ... + 8182747745.

It is an arithmetic number, because the mean of its divisors is an integer number (12490849292625).

Almost surely, 2^{355220320122440} is an apocalyptic number.

It is an amenable number.

355220320122440 is an abundant number, since it is smaller than the sum of its proper divisors (444194034605560).

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

355220320122440 is a wasteful number, since it uses less digits than its factorization.

355220320122440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81870 (or 81866 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 355220320122440 its reverse (44221023022553), we get a palindrome (399441343144993).

The spelling of 355220320122440 in words is "three hundred fifty-five trillion, two hundred twenty billion, three hundred twenty million, one hundred twenty-two thousand, four hundred forty".