428785503077 has 2 divisors, whose sum is σ = 428785503078. Its totient is φ = 428785503076.

The previous prime is 428785503073. The next prime is 428785503109. The reversal of 428785503077 is 770305587824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310977983716 + 117807519361 = 557654^2 + 343231^2 .

It is a cyclic number.

It is not a de Polignac number, because 428785503077 - 2² = 428785503073 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428785503073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214392751538 + 214392751539.

It is an arithmetic number, because the mean of its divisors is an integer number (214392751539).

Almost surely, 2^428785503077 is an apocalyptic number.

It is an amenable number.

428785503077 is a deficient number, since it is larger than the sum of its proper divisors (1).

428785503077 is an equidigital number, since it uses as much as digits as its factorization.

428785503077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13171200, while the sum is 56.

The spelling of 428785503077 in words is "four hundred twenty-eight billion, seven hundred eighty-five million, five hundred three thousand, seventy-seven".