56872879870871 has 2 divisors, whose sum is σ = 56872879870872. Its totient is φ = 56872879870870.

The previous prime is 56872879870847. The next prime is 56872879870927. The reversal of 56872879870871 is 17807897827865.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56872879870871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56872879870871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56872879870811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28436439935435 + 28436439935436.

It is an arithmetic number, because the mean of its divisors is an integer number (28436439935436).

Almost surely, 2^{56872879870871} is an apocalyptic number.

56872879870871 is a deficient number, since it is larger than the sum of its proper divisors (1).

56872879870871 is an equidigital number, since it uses as much as digits as its factorization.

56872879870871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5310627840, while the sum is 83.

The spelling of 56872879870871 in words is "fifty-six trillion, eight hundred seventy-two billion, eight hundred seventy-nine million, eight hundred seventy thousand, eight hundred seventy-one".