1642537902773 has 2 divisors, whose sum is σ = 1642537902774. Its totient is φ = 1642537902772.

The previous prime is 1642537902721. The next prime is 1642537902799. The reversal of 1642537902773 is 3772097352461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1621911772849 + 20626129924 = 1273543^2 + 143618^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642537902773 - 2⁸ = 1642537902517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642537902703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821268951386 + 821268951387.

It is an arithmetic number, because the mean of its divisors is an integer number (821268951387).

Almost surely, 2^{1642537902773} is an apocalyptic number.

It is an amenable number.

1642537902773 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642537902773 is an equidigital number, since it uses as much as digits as its factorization.

1642537902773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13335840, while the sum is 56.

The spelling of 1642537902773 in words is "one trillion, six hundred forty-two billion, five hundred thirty-seven million, nine hundred two thousand, seven hundred seventy-three".