5351688861521 has 2 divisors, whose sum is σ = 5351688861522. Its totient is φ = 5351688861520.

The previous prime is 5351688861511. The next prime is 5351688861587. The reversal of 5351688861521 is 1251688861535.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3397533697600 + 1954155163921 = 1843240^2 + 1397911^2 .

It is a cyclic number.

It is not a de Polignac number, because 5351688861521 - 2³⁸ = 5076810954577 is a prime.

It is a super-2 number, since 2×5351688861521² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5351688861511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2675844430760 + 2675844430761.

It is an arithmetic number, because the mean of its divisors is an integer number (2675844430761).

Almost surely, 2^{5351688861521} is an apocalyptic number.

It is an amenable number.

5351688861521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5351688861521 is an equidigital number, since it uses as much as digits as its factorization.

5351688861521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824000, while the sum is 59.

The spelling of 5351688861521 in words is "five trillion, three hundred fifty-one billion, six hundred eighty-eight million, eight hundred sixty-one thousand, five hundred twenty-one".