825577555493 has 2 divisors, whose sum is σ = 825577555494. Its totient is φ = 825577555492.

The previous prime is 825577555409. The next prime is 825577555513. The reversal of 825577555493 is 394555775528.

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., 600690101764 + 224887453729 = 775042^2 + 474223^2 .

It is a cyclic number.

It is not a de Polignac number, because 825577555493 - 2¹² = 825577551397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825577555093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412788777746 + 412788777747.

It is an arithmetic number, because the mean of its divisors is an integer number (412788777747).

Almost surely, 2^825577555493 is an apocalyptic number.

It is an amenable number.

825577555493 is a deficient number, since it is larger than the sum of its proper divisors (1).

825577555493 is an equidigital number, since it uses as much as digits as its factorization.

825577555493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600000, while the sum is 65.

The spelling of 825577555493 in words is "eight hundred twenty-five billion, five hundred seventy-seven million, five hundred fifty-five thousand, four hundred ninety-three".