656378624071 has 2 divisors, whose sum is σ = 656378624072. Its totient is φ = 656378624070.

The previous prime is 656378624059. The next prime is 656378624107. The reversal of 656378624071 is 170426873656.

Together with next prime (656378624107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656378624071 - 2¹⁵ = 656378591303 is a prime.

It is a super-2 number, since 2×656378624071² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656378624171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328189312035 + 328189312036.

It is an arithmetic number, because the mean of its divisors is an integer number (328189312036).

Almost surely, 2^656378624071 is an apocalyptic number.

656378624071 is a deficient number, since it is larger than the sum of its proper divisors (1).

656378624071 is an equidigital number, since it uses as much as digits as its factorization.

656378624071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 55.

The spelling of 656378624071 in words is "six hundred fifty-six billion, three hundred seventy-eight million, six hundred twenty-four thousand, seventy-one".