1021683888045 has 24 divisors (see below), whose sum is σ = 1773334783896. Its totient is φ = 544154675328.

The previous prime is 1021683888037. The next prime is 1021683888083. The reversal of 1021683888045 is 5408883861201.

1021683888045 is a `hidden beast` number, since 1 + 0 + 216 + 8 + 388 + 8 + 0 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 150422192649 + 871261695396 = 387843^2 + 933414^2 .

It is not a de Polignac number, because 1021683888045 - 2³ = 1021683888037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021683887982 and 1021683888000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15454114 + ... + 15520083.

It is an arithmetic number, because the mean of its divisors is an integer number (73888949329).

Almost surely, 2^{1021683888045} is an apocalyptic number.

1021683888045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021683888045 is a deficient number, since it is larger than the sum of its proper divisors (751650895851).

1021683888045 is a wasteful number, since it uses less digits than its factorization.

1021683888045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30974941 (or 30974938 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 54.

The spelling of 1021683888045 in words is "one trillion, twenty-one billion, six hundred eighty-three million, eight hundred eighty-eight thousand, forty-five".