1620204455546 has 16 divisors (see below), whose sum is σ = 2449752474624. Its totient is φ = 803621909664.

The previous prime is 1620204455477. The next prime is 1620204455591. The reversal of 1620204455546 is 6455544020261.

It is a super-2 number, since 2×1620204455546² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1620204455497 and 1620204455506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1631201 + ... + 2429243.

It is an arithmetic number, because the mean of its divisors is an integer number (153109529664).

Almost surely, 2^{1620204455546} is an apocalyptic number.

1620204455546 is a deficient number, since it is larger than the sum of its proper divisors (829548019078).

1620204455546 is a wasteful number, since it uses less digits than its factorization.

1620204455546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806165.

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 1620204455546 in words is "one trillion, six hundred twenty billion, two hundred four million, four hundred fifty-five thousand, five hundred forty-six".