825577555513 has 2 divisors, whose sum is σ = 825577555514. Its totient is φ = 825577555512.

The previous prime is 825577555493. The next prime is 825577555541. The reversal of 825577555513 is 315555775528.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 782168666409 + 43408889104 = 884403^2 + 208348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825577555513 is a prime.

It is not a weakly prime, because it can be changed into another prime (825577555813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412788777756 + 412788777757.

It is an arithmetic number, because the mean of its divisors is an integer number (412788777757).

Almost surely, 2^825577555513 is an apocalyptic number.

It is an amenable number.

825577555513 is a deficient number, since it is larger than the sum of its proper divisors (1).

825577555513 is an equidigital number, since it uses as much as digits as its factorization.

825577555513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36750000, while the sum is 58.

The spelling of 825577555513 in words is "eight hundred twenty-five billion, five hundred seventy-seven million, five hundred fifty-five thousand, five hundred thirteen".