656378623247 has 2 divisors, whose sum is σ = 656378623248. Its totient is φ = 656378623246.

The previous prime is 656378623177. The next prime is 656378623259. The reversal of 656378623247 is 742326873656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 656378623247 - 2¹² = 656378619151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656378623297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328189311623 + 328189311624.

It is an arithmetic number, because the mean of its divisors is an integer number (328189311624).

Almost surely, 2^656378623247 is an apocalyptic number.

656378623247 is a deficient number, since it is larger than the sum of its proper divisors (1).

656378623247 is an equidigital number, since it uses as much as digits as its factorization.

656378623247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60963840, while the sum is 59.

The spelling of 656378623247 in words is "six hundred fifty-six billion, three hundred seventy-eight million, six hundred twenty-three thousand, two hundred forty-seven".