14785578257 has 2 divisors, whose sum is σ = 14785578258. Its totient is φ = 14785578256.

The previous prime is 14785578253. The next prime is 14785578271. The reversal of 14785578257 is 75287558741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8493281281 + 6292296976 = 92159^2 + 79324^2 .

It is an emirp because it is prime and its reverse (75287558741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14785578257 - 2² = 14785578253 is a prime.

It is a super-2 number, since 2×14785578257² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 14785578196 and 14785578205.

It is not a weakly prime, because it can be changed into another prime (14785578253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7392789128 + 7392789129.

It is an arithmetic number, because the mean of its divisors is an integer number (7392789129).

Almost surely, 2^14785578257 is an apocalyptic number.

It is an amenable number.

14785578257 is a deficient number, since it is larger than the sum of its proper divisors (1).

14785578257 is an equidigital number, since it uses as much as digits as its factorization.

14785578257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21952000, while the sum is 59.

The spelling of 14785578257 in words is "fourteen billion, seven hundred eighty-five million, five hundred seventy-eight thousand, two hundred fifty-seven".