52403634521 has 6 divisors (see below), whose sum is σ = 60959330010. Its totient is φ = 44917400976.

The previous prime is 52403634473. The next prime is 52403634559. The reversal of 52403634521 is 12543630425.

It can be written as a sum of positive squares in only one way, i.e., 36265489225 + 16138145296 = 190435^2 + 127036^2 .

It is not a de Polignac number, because 52403634521 - 2³⁰ = 51329892697 is a prime.

It is a super-2 number, since 2×52403634521² (a number of 22 digits) contains 22 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 (52403634581) 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, 534730916 + ... + 534731013.

It is an arithmetic number, because the mean of its divisors is an integer number (10159888335).

Almost surely, 2^52403634521 is an apocalyptic number.

It is an amenable number.

52403634521 is a deficient number, since it is larger than the sum of its proper divisors (8555695489).

52403634521 is a wasteful number, since it uses less digits than its factorization.

52403634521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069461943 (or 1069461936 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 52403634521 in words is "fifty-two billion, four hundred three million, six hundred thirty-four thousand, five hundred twenty-one".