1620051463993 has 2 divisors, whose sum is σ = 1620051463994. Its totient is φ = 1620051463992.

The previous prime is 1620051463967. The next prime is 1620051464033. The reversal of 1620051463993 is 3993641500261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 957663831609 + 662387632384 = 978603^2 + 813872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1620051463993 - 2³⁷ = 1482612510521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1620051466993) 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 as a sum of consecutive naturals, namely, 810025731996 + 810025731997.

It is an arithmetic number, because the mean of its divisors is an integer number (810025731997).

Almost surely, 2^{1620051463993} is an apocalyptic number.

It is an amenable number.

1620051463993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620051463993 is an equidigital number, since it uses as much as digits as its factorization.

1620051463993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 1620051463993 in words is "one trillion, six hundred twenty billion, fifty-one million, four hundred sixty-three thousand, nine hundred ninety-three".