423515640077 has 2 divisors, whose sum is σ = 423515640078. Its totient is φ = 423515640076.

The previous prime is 423515640029. The next prime is 423515640091. The reversal of 423515640077 is 770046515324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412207657156 + 11307982921 = 642034^2 + 106339^2 .

It is a cyclic number.

It is not a de Polignac number, because 423515640077 - 2²⁶ = 423448531213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423515640007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211757820038 + 211757820039.

It is an arithmetic number, because the mean of its divisors is an integer number (211757820039).

Almost surely, 2^423515640077 is an apocalyptic number.

It is an amenable number.

423515640077 is a deficient number, since it is larger than the sum of its proper divisors (1).

423515640077 is an equidigital number, since it uses as much as digits as its factorization.

423515640077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 423515640077 in words is "four hundred twenty-three billion, five hundred fifteen million, six hundred forty thousand, seventy-seven".