53409356513 has 4 divisors (see below), whose sum is σ = 53546656020. Its totient is φ = 53272057008.

The previous prime is 53409356491. The next prime is 53409356527. The reversal of 53409356513 is 31565390435.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31565390435 = 5 ⋅6313078087.

It can be written as a sum of positive squares in 2 ways, for example, as 14549908129 + 38859448384 = 120623^2 + 197128^2 .

It is a cyclic number.

It is not a de Polignac number, because 53409356513 - 2²⁴ = 53392579297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53409356563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68649170 + ... + 68649947.

It is an arithmetic number, because the mean of its divisors is an integer number (13386664005).

Almost surely, 2^53409356513 is an apocalyptic number.

It is an amenable number.

53409356513 is a deficient number, since it is larger than the sum of its proper divisors (137299507).

53409356513 is a wasteful number, since it uses less digits than its factorization.

53409356513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137299506.

The product of its (nonzero) digits is 729000, while the sum is 44.

The spelling of 53409356513 in words is "fifty-three billion, four hundred nine million, three hundred fifty-six thousand, five hundred thirteen".