425637554251391 has 2 divisors, whose sum is σ = 425637554251392. Its totient is φ = 425637554251390.

The previous prime is 425637554251381. The next prime is 425637554251409. The reversal of 425637554251391 is 193152455736524.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425637554251391 - 2⁴² = 421239507740287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425637554251331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212818777125695 + 212818777125696.

It is an arithmetic number, because the mean of its divisors is an integer number (212818777125696).

Almost surely, 2^{425637554251391} is an apocalyptic number.

425637554251391 is a deficient number, since it is larger than the sum of its proper divisors (1).

425637554251391 is an equidigital number, since it uses as much as digits as its factorization.

425637554251391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080000, while the sum is 62.

The spelling of 425637554251391 in words is "four hundred twenty-five trillion, six hundred thirty-seven billion, five hundred fifty-four million, two hundred fifty-one thousand, three hundred ninety-one".