53163651521 has 2 divisors, whose sum is σ = 53163651522. Its totient is φ = 53163651520.

The previous prime is 53163651517. The next prime is 53163651547. The reversal of 53163651521 is 12515636135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52762090000 + 401561521 = 229700^2 + 20039^2 .

It is a cyclic number.

It is not a de Polignac number, because 53163651521 - 2² = 53163651517 is a prime.

It is a super-2 number, since 2×53163651521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53163611521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26581825760 + 26581825761.

It is an arithmetic number, because the mean of its divisors is an integer number (26581825761).

Almost surely, 2^53163651521 is an apocalyptic number.

It is an amenable number.

53163651521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53163651521 is an equidigital number, since it uses as much as digits as its factorization.

53163651521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 38.

The spelling of 53163651521 in words is "fifty-three billion, one hundred sixty-three million, six hundred fifty-one thousand, five hundred twenty-one".