53138968421 has 8 divisors (see below), whose sum is σ = 66251181504. Its totient is φ = 41406988320.

The previous prime is 53138968397. The next prime is 53138968423. The reversal of 53138968421 is 12486983135.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53138968421 - 2⁶ = 53138968357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53138968421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53138968423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345058160 + ... + 345058313.

It is an arithmetic number, because the mean of its divisors is an integer number (8281397688).

Almost surely, 2^53138968421 is an apocalyptic number.

It is an amenable number.

53138968421 is a deficient number, since it is larger than the sum of its proper divisors (13112213083).

53138968421 is a wasteful number, since it uses less digits than its factorization.

53138968421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690116491.

The product of its digits is 1244160, while the sum is 50.

The spelling of 53138968421 in words is "fifty-three billion, one hundred thirty-eight million, nine hundred sixty-eight thousand, four hundred twenty-one".