420201375390677 has 2 divisors, whose sum is σ = 420201375390678. Its totient is φ = 420201375390676.

The previous prime is 420201375390661. The next prime is 420201375390721. The reversal of 420201375390677 is 776093573102024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283902078167236 + 136299297223441 = 16849394^2 + 11674729^2 .

It is a cyclic number.

It is not a de Polignac number, because 420201375390677 - 2⁴ = 420201375390661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420201375395677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210100687695338 + 210100687695339.

It is an arithmetic number, because the mean of its divisors is an integer number (210100687695339).

Almost surely, 2^{420201375390677} is an apocalyptic number.

It is an amenable number.

420201375390677 is a deficient number, since it is larger than the sum of its proper divisors (1).

420201375390677 is an equidigital number, since it uses as much as digits as its factorization.

420201375390677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13335840, while the sum is 56.

The spelling of 420201375390677 in words is "four hundred twenty trillion, two hundred one billion, three hundred seventy-five million, three hundred ninety thousand, six hundred seventy-seven".