53155551697 has 2 divisors, whose sum is σ = 53155551698. Its totient is φ = 53155551696.

The previous prime is 53155551667. The next prime is 53155551719. The reversal of 53155551697 is 79615555135.

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., 48530327616 + 4625224081 = 220296^2 + 68009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53155551697 is a prime.

It is not a weakly prime, because it can be changed into another prime (53155551607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26577775848 + 26577775849.

It is an arithmetic number, because the mean of its divisors is an integer number (26577775849).

Almost surely, 2^53155551697 is an apocalyptic number.

It is an amenable number.

53155551697 is a deficient number, since it is larger than the sum of its proper divisors (1).

53155551697 is an equidigital number, since it uses as much as digits as its factorization.

53155551697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3543750, while the sum is 52.

The spelling of 53155551697 in words is "fifty-three billion, one hundred fifty-five million, five hundred fifty-one thousand, six hundred ninety-seven".