426646377531251 has 2 divisors, whose sum is σ = 426646377531252. Its totient is φ = 426646377531250.

The previous prime is 426646377531191. The next prime is 426646377531281. The reversal of 426646377531251 is 152135773646624.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426646377531251 is a prime.

It is not a weakly prime, because it can be changed into another prime (426646377531281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213323188765625 + 213323188765626.

It is an arithmetic number, because the mean of its divisors is an integer number (213323188765626).

Almost surely, 2^{426646377531251} is an apocalyptic number.

426646377531251 is a deficient number, since it is larger than the sum of its proper divisors (1).

426646377531251 is an equidigital number, since it uses as much as digits as its factorization.

426646377531251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 152409600, while the sum is 62.

The spelling of 426646377531251 in words is "four hundred twenty-six trillion, six hundred forty-six billion, three hundred seventy-seven million, five hundred thirty-one thousand, two hundred fifty-one".