425909420819 has 2 divisors, whose sum is σ = 425909420820. Its totient is φ = 425909420818.

The previous prime is 425909420801. The next prime is 425909420821. The reversal of 425909420819 is 918024909524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425909420819 is a prime.

It is a super-2 number, since 2×425909420819² (a number of 24 digits) contains 22 as substring.

Together with 425909420821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (425909420869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212954710409 + 212954710410.

It is an arithmetic number, because the mean of its divisors is an integer number (212954710410).

Almost surely, 2^425909420819 is an apocalyptic number.

425909420819 is a deficient number, since it is larger than the sum of its proper divisors (1).

425909420819 is an equidigital number, since it uses as much as digits as its factorization.

425909420819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 425909420819 in words is "four hundred twenty-five billion, nine hundred nine million, four hundred twenty thousand, eight hundred nineteen".