53705779669 has 2 divisors, whose sum is σ = 53705779670. Its totient is φ = 53705779668.

The previous prime is 53705779663. The next prime is 53705779681. The reversal of 53705779669 is 96697750735.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51315840900 + 2389938769 = 226530^2 + 48887^2 .

It is a cyclic number.

It is not a de Polignac number, because 53705779669 - 2⁹ = 53705779157 is a prime.

It is a super-2 number, since 2×53705779669² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53705779669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53705779663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26852889834 + 26852889835.

It is an arithmetic number, because the mean of its divisors is an integer number (26852889835).

Almost surely, 2^53705779669 is an apocalyptic number.

It is an amenable number.

53705779669 is a deficient number, since it is larger than the sum of its proper divisors (1).

53705779669 is an equidigital number, since it uses as much as digits as its factorization.

53705779669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75014100, while the sum is 64.

The spelling of 53705779669 in words is "fifty-three billion, seven hundred five million, seven hundred seventy-nine thousand, six hundred sixty-nine".