55353540685649 has 2 divisors, whose sum is σ = 55353540685650. Its totient is φ = 55353540685648.

The previous prime is 55353540685637. The next prime is 55353540685687. The reversal of 55353540685649 is 94658604535355.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42584760490000 + 12768780195649 = 6525700^2 + 3573343^2 .

It is a cyclic number.

It is not a de Polignac number, because 55353540685649 - 2⁴ = 55353540685633 is a prime.

It is a super-4 number, since 4×55353540685649⁴ (a number of 56 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (55353540685049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27676770342824 + 27676770342825.

It is an arithmetic number, because the mean of its divisors is an integer number (27676770342825).

Almost surely, 2^{55353540685649} is an apocalyptic number.

It is an amenable number.

55353540685649 is a deficient number, since it is larger than the sum of its proper divisors (1).

55353540685649 is an equidigital number, since it uses as much as digits as its factorization.

55353540685649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400000, while the sum is 68.

The spelling of 55353540685649 in words is "fifty-five trillion, three hundred fifty-three billion, five hundred forty million, six hundred eighty-five thousand, six hundred forty-nine".