634803409525 has 6 divisors (see below), whose sum is σ = 787156227842. Its totient is φ = 507842727600.

The previous prime is 634803409511. The next prime is 634803409529. The reversal of 634803409525 is 525904308436.

It can be written as a sum of positive squares in 3 ways, for example, as 2830878436 + 631972531089 = 53206^2 + 794967^2 .

It is not a de Polignac number, because 634803409525 - 2⁷ = 634803409397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634803409529) 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, 12696068166 + ... + 12696068215.

Almost surely, 2^634803409525 is an apocalyptic number.

It is an amenable number.

634803409525 is a deficient number, since it is larger than the sum of its proper divisors (152352818317).

634803409525 is a wasteful number, since it uses less digits than its factorization.

634803409525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25392136391 (or 25392136386 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 634803409525 in words is "six hundred thirty-four billion, eight hundred three million, four hundred nine thousand, five hundred twenty-five".