1621018386083 has 54 divisors (see below), whose sum is σ = 1749522663252. Its totient is φ = 1501663625280.

The previous prime is 1621018386079. The next prime is 1621018386103. The reversal of 1621018386083 is 3806838101261.

It is not a de Polignac number, because 1621018386083 - 2² = 1621018386079 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1621018386583) by changing a digit.

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 53 ways as a sum of consecutive naturals, for example, 19530341960 + ... + 19530342042.

It is an arithmetic number, because the mean of its divisors is an integer number (32398567838).

Almost surely, 2^{1621018386083} is an apocalyptic number.

1621018386083 is a deficient number, since it is larger than the sum of its proper divisors (128504277169).

1621018386083 is an frugal number, since it uses more digits than its factorization.

1621018386083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 1621018386083 in words is "one trillion, six hundred twenty-one billion, eighteen million, three hundred eighty-six thousand, eighty-three".