53806719661 has 2 divisors, whose sum is σ = 53806719662. Its totient is φ = 53806719660.

The previous prime is 53806719653. The next prime is 53806719667. The reversal of 53806719661 is 16691760835.

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., 43558194436 + 10248525225 = 208706^2 + 101235^2 .

It is a cyclic number.

It is not a de Polignac number, because 53806719661 - 2³ = 53806719653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53806719599 and 53806719608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53806719667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26903359830 + 26903359831.

It is an arithmetic number, because the mean of its divisors is an integer number (26903359831).

Almost surely, 2^53806719661 is an apocalyptic number.

It is an amenable number.

53806719661 is a deficient number, since it is larger than the sum of its proper divisors (1).

53806719661 is an equidigital number, since it uses as much as digits as its factorization.

53806719661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 53806719661 in words is "fifty-three billion, eight hundred six million, seven hundred nineteen thousand, six hundred sixty-one".