8125523449 has 2 divisors, whose sum is σ = 8125523450. Its totient is φ = 8125523448.

The previous prime is 8125523407. The next prime is 8125523501. The reversal of 8125523449 is 9443255218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7853504400 + 272019049 = 88620^2 + 16493^2 .

It is a cyclic number.

It is not a de Polignac number, because 8125523449 - 2⁷ = 8125523321 is a prime.

It is not a weakly prime, because it can be changed into another prime (8125523249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4062761724 + 4062761725.

It is an arithmetic number, because the mean of its divisors is an integer number (4062761725).

Almost surely, 2^8125523449 is an apocalyptic number.

It is an amenable number.

8125523449 is a deficient number, since it is larger than the sum of its proper divisors (1).

8125523449 is an equidigital number, since it uses as much as digits as its factorization.

8125523449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 43.

The square root of 8125523449 is about 90141.6854124661. The cubic root of 8125523449 is about 2010.4060505701.

The spelling of 8125523449 in words is "eight billion, one hundred twenty-five million, five hundred twenty-three thousand, four hundred forty-nine".