420356578687 has 2 divisors, whose sum is σ = 420356578688. Its totient is φ = 420356578686.

The previous prime is 420356578651. The next prime is 420356578693. The reversal of 420356578687 is 786875653024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420356578687 - 2¹⁵ = 420356545919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420356578627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210178289343 + 210178289344.

It is an arithmetic number, because the mean of its divisors is an integer number (210178289344).

Almost surely, 2^420356578687 is an apocalyptic number.

420356578687 is a deficient number, since it is larger than the sum of its proper divisors (1).

420356578687 is an equidigital number, since it uses as much as digits as its factorization.

420356578687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67737600, while the sum is 61.

The spelling of 420356578687 in words is "four hundred twenty billion, three hundred fifty-six million, five hundred seventy-eight thousand, six hundred eighty-seven".