53685219257 has 2 divisors, whose sum is σ = 53685219258. Its totient is φ = 53685219256.

The previous prime is 53685219251. The next prime is 53685219317. The reversal of 53685219257 is 75291258635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27863621776 + 25821597481 = 166924^2 + 160691^2 .

It is a cyclic number.

It is not a de Polignac number, because 53685219257 - 2²² = 53681024953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53685219199 and 53685219208.

It is not a weakly prime, because it can be changed into another prime (53685219251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26842609628 + 26842609629.

It is an arithmetic number, because the mean of its divisors is an integer number (26842609629).

Almost surely, 2^53685219257 is an apocalyptic number.

It is an amenable number.

53685219257 is a deficient number, since it is larger than the sum of its proper divisors (1).

53685219257 is an equidigital number, since it uses as much as digits as its factorization.

53685219257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536000, while the sum is 53.

The spelling of 53685219257 in words is "fifty-three billion, six hundred eighty-five million, two hundred nineteen thousand, two hundred fifty-seven".