420356577691 has 2 divisors, whose sum is σ = 420356577692. Its totient is φ = 420356577690.

The previous prime is 420356577671. The next prime is 420356577757. The reversal of 420356577691 is 196775653024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420356577691 is a prime.

It is not a weakly prime, because it can be changed into another prime (420356577601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210178288845 + 210178288846.

It is an arithmetic number, because the mean of its divisors is an integer number (210178288846).

Almost surely, 2^420356577691 is an apocalyptic number.

420356577691 is a deficient number, since it is larger than the sum of its proper divisors (1).

420356577691 is an equidigital number, since it uses as much as digits as its factorization.

420356577691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9525600, while the sum is 55.

The spelling of 420356577691 in words is "four hundred twenty billion, three hundred fifty-six million, five hundred seventy-seven thousand, six hundred ninety-one".