56861142511 has 2 divisors, whose sum is σ = 56861142512. Its totient is φ = 56861142510.

The previous prime is 56861142487. The next prime is 56861142551. The reversal of 56861142511 is 11524116865.

It is an a-pointer prime, because the next prime (56861142551) can be obtained adding 56861142511 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56861142511 - 2¹¹ = 56861140463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56861142551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28430571255 + 28430571256.

It is an arithmetic number, because the mean of its divisors is an integer number (28430571256).

Almost surely, 2^56861142511 is an apocalyptic number.

56861142511 is a deficient number, since it is larger than the sum of its proper divisors (1).

56861142511 is an equidigital number, since it uses as much as digits as its factorization.

56861142511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 40.

The spelling of 56861142511 in words is "fifty-six billion, eight hundred sixty-one million, one hundred forty-two thousand, five hundred eleven".