428414850991 has 2 divisors, whose sum is σ = 428414850992. Its totient is φ = 428414850990.

The previous prime is 428414850977. The next prime is 428414851001. The reversal of 428414850991 is 199058414824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428414850991 - 2²³ = 428406462383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428414857991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214207425495 + 214207425496.

It is an arithmetic number, because the mean of its divisors is an integer number (214207425496).

Almost surely, 2^428414850991 is an apocalyptic number.

428414850991 is a deficient number, since it is larger than the sum of its proper divisors (1).

428414850991 is an equidigital number, since it uses as much as digits as its factorization.

428414850991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 428414850991 in words is "four hundred twenty-eight billion, four hundred fourteen million, eight hundred fifty thousand, nine hundred ninety-one".