56305315549661 has 2 divisors, whose sum is σ = 56305315549662. Its totient is φ = 56305315549660.

The previous prime is 56305315549601. The next prime is 56305315549687. The reversal of 56305315549661 is 16694551350365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39010579764025 + 17294735785636 = 6245845^2 + 4158694^2 .

It is a cyclic number.

It is not a de Polignac number, because 56305315549661 - 2⁶ = 56305315549597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56305315549661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56305315549601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28152657774830 + 28152657774831.

It is an arithmetic number, because the mean of its divisors is an integer number (28152657774831).

Almost surely, 2^{56305315549661} is an apocalyptic number.

It is an amenable number.

56305315549661 is a deficient number, since it is larger than the sum of its proper divisors (1).

56305315549661 is an equidigital number, since it uses as much as digits as its factorization.

56305315549661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740000, while the sum is 59.

The spelling of 56305315549661 in words is "fifty-six trillion, three hundred five billion, three hundred fifteen million, five hundred forty-nine thousand, six hundred sixty-one".