825745335381 has 6 divisors (see below), whose sum is σ = 1192743262230. Its totient is φ = 550496890248.

The previous prime is 825745335379. The next prime is 825745335403. The reversal of 825745335381 is 183533547528.

825745335381 is a `hidden beast` number, since 8 + 2 + 5 + 74 + 5 + 33 + 538 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 483706340100 + 342038995281 = 695490^2 + 584841^2 .

It is not a de Polignac number, because 825745335381 - 2¹ = 825745335379 is a prime.

It is a super-2 number, since 2×825745335381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825745335301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45874740846 + ... + 45874740863.

It is an arithmetic number, because the mean of its divisors is an integer number (198790543705).

Almost surely, 2^825745335381 is an apocalyptic number.

It is an amenable number.

825745335381 is a deficient number, since it is larger than the sum of its proper divisors (366997926849).

825745335381 is a wasteful number, since it uses less digits than its factorization.

825745335381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91749481715 (or 91749481712 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 54.

The spelling of 825745335381 in words is "eight hundred twenty-five billion, seven hundred forty-five million, three hundred thirty-five thousand, three hundred eighty-one".