823765264425 has 18 divisors (see below), whose sum is σ = 1475455118462. Its totient is φ = 439341474240.

The previous prime is 823765264297. The next prime is 823765264429. The reversal of 823765264425 is 524462567328.

823765264425 is a `hidden beast` number, since 8 + 2 + 3 + 76 + 526 + 4 + 42 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 3978077184 + 819787187241 = 63072^2 + 905421^2 .

It is not a de Polignac number, because 823765264425 - 2⁷ = 823765264297 is a prime.

It is a super-4 number, since 4×823765264425⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (823765264429) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1830589252 + ... + 1830589701.

Almost surely, 2^823765264425 is an apocalyptic number.

It is an amenable number.

823765264425 is a deficient number, since it is larger than the sum of its proper divisors (651689854037).

823765264425 is a wasteful number, since it uses less digits than its factorization.

823765264425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3661178969 (or 3661178961 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 54.

The spelling of 823765264425 in words is "eight hundred twenty-three billion, seven hundred sixty-five million, two hundred sixty-four thousand, four hundred twenty-five".