53942165909 has 2 divisors, whose sum is σ = 53942165910. Its totient is φ = 53942165908.

The previous prime is 53942165833. The next prime is 53942165987. The reversal of 53942165909 is 90956124935.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53938669009 + 3496900 = 232247^2 + 1870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53942165909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53942165509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26971082954 + 26971082955.

It is an arithmetic number, because the mean of its divisors is an integer number (26971082955).

Almost surely, 2^53942165909 is an apocalyptic number.

It is an amenable number.

53942165909 is a deficient number, since it is larger than the sum of its proper divisors (1).

53942165909 is an equidigital number, since it uses as much as digits as its factorization.

53942165909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2624400, while the sum is 53.

The spelling of 53942165909 in words is "fifty-three billion, nine hundred forty-two million, one hundred sixty-five thousand, nine hundred nine".