1620492053017 has 2 divisors, whose sum is σ = 1620492053018. Its totient is φ = 1620492053016.

The previous prime is 1620492052969. The next prime is 1620492053027. The reversal of 1620492053017 is 7103502940261.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1617129328896 + 3362724121 = 1271664^2 + 57989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620492053017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1620492053027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810246026508 + 810246026509.

It is an arithmetic number, because the mean of its divisors is an integer number (810246026509).

Almost surely, 2^{1620492053017} is an apocalyptic number.

It is an amenable number.

1620492053017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620492053017 is an equidigital number, since it uses as much as digits as its factorization.

1620492053017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

Adding to 1620492053017 its reverse (7103502940261), we get a palindrome (8723994993278).

The spelling of 1620492053017 in words is "one trillion, six hundred twenty billion, four hundred ninety-two million, fifty-three thousand, seventeen".