56861457017 has 2 divisors, whose sum is σ = 56861457018. Its totient is φ = 56861457016.

The previous prime is 56861456929. The next prime is 56861457067. The reversal of 56861457017 is 71075416865.

It is a happy number.

It is an a-pointer prime, because the next prime (56861457067) can be obtained adding 56861457017 to its sum of digits (50).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37347881536 + 19513575481 = 193256^2 + 139691^2 .

It is a cyclic number.

It is not a de Polignac number, because 56861457017 - 2⁸ = 56861456761 is a prime.

It is a super-2 number, since 2×56861457017² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56861457067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28430728508 + 28430728509.

It is an arithmetic number, because the mean of its divisors is an integer number (28430728509).

Almost surely, 2^56861457017 is an apocalyptic number.

It is an amenable number.

56861457017 is a deficient number, since it is larger than the sum of its proper divisors (1).

56861457017 is an equidigital number, since it uses as much as digits as its factorization.

56861457017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 56861457017 in words is "fifty-six billion, eight hundred sixty-one million, four hundred fifty-seven thousand, seventeen".