53439718236 has 12 divisors (see below), whose sum is σ = 124692675912. Its totient is φ = 17813239408.

The previous prime is 53439718219. The next prime is 53439718237. The reversal of 53439718236 is 63281793435.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53439718237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2226654915 + ... + 2226654938.

It is an arithmetic number, because the mean of its divisors is an integer number (10391056326).

Almost surely, 2^53439718236 is an apocalyptic number.

It is an amenable number.

53439718236 is an abundant number, since it is smaller than the sum of its proper divisors (71252957676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53439718236 is a wasteful number, since it uses less digits than its factorization.

53439718236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4453309860 (or 4453309858 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 51.

The spelling of 53439718236 in words is "fifty-three billion, four hundred thirty-nine million, seven hundred eighteen thousand, two hundred thirty-six".