42640604653 has 2 divisors, whose sum is σ = 42640604654. Its totient is φ = 42640604652.

The previous prime is 42640604623. The next prime is 42640604663. The reversal of 42640604653 is 35640604624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23464725124 + 19175879529 = 153182^2 + 138477^2 .

It is a cyclic number.

It is not a de Polignac number, because 42640604653 - 2²¹ = 42638507501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42640604623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21320302326 + 21320302327.

It is an arithmetic number, because the mean of its divisors is an integer number (21320302327).

Almost surely, 2^42640604653 is an apocalyptic number.

It is an amenable number.

42640604653 is a deficient number, since it is larger than the sum of its proper divisors (1).

42640604653 is an equidigital number, since it uses as much as digits as its factorization.

42640604653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 42640604653 in words is "forty-two billion, six hundred forty million, six hundred four thousand, six hundred fifty-three".