1642315553 has 2 divisors, whose sum is σ = 1642315554. Its totient is φ = 1642315552.

The previous prime is 1642315471. The next prime is 1642315561. The reversal of 1642315553 is 3555132461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1518816784 + 123498769 = 38972^2 + 11113^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642315553 - 2²⁸ = 1373880097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1642318553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821157776 + 821157777.

It is an arithmetic number, because the mean of its divisors is an integer number (821157777).

Almost surely, 2^1642315553 is an apocalyptic number.

It is an amenable number.

1642315553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642315553 is an equidigital number, since it uses as much as digits as its factorization.

1642315553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 35.

The square root of 1642315553 is about 40525.4926311822. The cubic root of 1642315553 is about 1179.8284613710.

The spelling of 1642315553 in words is "one billion, six hundred forty-two million, three hundred fifteen thousand, five hundred fifty-three".