642634054033 has 2 divisors, whose sum is σ = 642634054034. Its totient is φ = 642634054032.

The previous prime is 642634054001. The next prime is 642634054057. The reversal of 642634054033 is 330450436246.

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., 471992358289 + 170641695744 = 687017^2 + 413088^2 .

It is a cyclic number.

It is not a de Polignac number, because 642634054033 - 2⁵ = 642634054001 is a prime.

It is not a weakly prime, because it can be changed into another prime (642634052033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321317027016 + 321317027017.

It is an arithmetic number, because the mean of its divisors is an integer number (321317027017).

Almost surely, 2^642634054033 is an apocalyptic number.

It is an amenable number.

642634054033 is a deficient number, since it is larger than the sum of its proper divisors (1).

642634054033 is an equidigital number, since it uses as much as digits as its factorization.

642634054033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 40.

The spelling of 642634054033 in words is "six hundred forty-two billion, six hundred thirty-four million, fifty-four thousand, thirty-three".