53665920019 has 2 divisors, whose sum is σ = 53665920020. Its totient is φ = 53665920018.

The previous prime is 53665920017. The next prime is 53665920029. The reversal of 53665920019 is 91002956635.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53665920019 - 2¹ = 53665920017 is a prime.

It is a super-2 number, since 2×53665920019² (a number of 22 digits) contains 22 as substring.

Together with 53665920017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (53665920017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26832960009 + 26832960010.

It is an arithmetic number, because the mean of its divisors is an integer number (26832960010).

Almost surely, 2^53665920019 is an apocalyptic number.

53665920019 is a deficient number, since it is larger than the sum of its proper divisors (1).

53665920019 is an equidigital number, since it uses as much as digits as its factorization.

53665920019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 437400, while the sum is 46.

The spelling of 53665920019 in words is "fifty-three billion, six hundred sixty-five million, nine hundred twenty thousand, nineteen".