425325691891 has 2 divisors, whose sum is σ = 425325691892. Its totient is φ = 425325691890.

The previous prime is 425325691873. The next prime is 425325691991. The reversal of 425325691891 is 198196523524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425325691891 - 2²⁷ = 425191474163 is a prime.

It is not a weakly prime, because it can be changed into another prime (425325691871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212662845945 + 212662845946.

It is an arithmetic number, because the mean of its divisors is an integer number (212662845946).

Almost surely, 2^425325691891 is an apocalyptic number.

425325691891 is a deficient number, since it is larger than the sum of its proper divisors (1).

425325691891 is an equidigital number, since it uses as much as digits as its factorization.

425325691891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 55.

The spelling of 425325691891 in words is "four hundred twenty-five billion, three hundred twenty-five million, six hundred ninety-one thousand, eight hundred ninety-one".