1020208450646 has 32 divisors (see below), whose sum is σ = 1952292595968. Its totient is φ = 388239999840.

The previous prime is 1020208450633. The next prime is 1020208450693. The reversal of 1020208450646 is 6460548020201.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77025125 + ... + 77038368.

It is an arithmetic number, because the mean of its divisors is an integer number (61009143624).

Almost surely, 2^{1020208450646} is an apocalyptic number.

1020208450646 is a deficient number, since it is larger than the sum of its proper divisors (932084145322).

1020208450646 is a wasteful number, since it uses less digits than its factorization.

1020208450646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154063556.

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 1020208450646 in words is "one trillion, twenty billion, two hundred eight million, four hundred fifty thousand, six hundred forty-six".