1621462316017 has 2 divisors, whose sum is σ = 1621462316018. Its totient is φ = 1621462316016.

The previous prime is 1621462316003. The next prime is 1621462316069. The reversal of 1621462316017 is 7106132641261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1419538805136 + 201923510881 = 1191444^2 + 449359^2 .

It is a cyclic number.

It is not a de Polignac number, because 1621462316017 - 2²³ = 1621453927409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1621462311017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810731158008 + 810731158009.

It is an arithmetic number, because the mean of its divisors is an integer number (810731158009).

Almost surely, 2^{1621462316017} is an apocalyptic number.

It is an amenable number.

1621462316017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1621462316017 is an equidigital number, since it uses as much as digits as its factorization.

1621462316017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

Adding to 1621462316017 its reverse (7106132641261), we get a palindrome (8727594957278).

The spelling of 1621462316017 in words is "one trillion, six hundred twenty-one billion, four hundred sixty-two million, three hundred sixteen thousand, seventeen".