53381278173 has 8 divisors (see below), whose sum is σ = 71828020000. Its totient is φ = 35261027568.

The previous prime is 53381278147. The next prime is 53381278177. The reversal of 53381278173 is 37187218335.

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

It is not a de Polignac number, because 53381278173 - 2⁹ = 53381277661 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 (53381278177) 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, 81622423 + ... + 81623076.

It is an arithmetic number, because the mean of its divisors is an integer number (8978502500).

Almost surely, 2^53381278173 is an apocalyptic number.

It is an amenable number.

53381278173 is a deficient number, since it is larger than the sum of its proper divisors (18446741827).

53381278173 is a wasteful number, since it uses less digits than its factorization.

53381278173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163245611.

The product of its digits is 846720, while the sum is 48.

The spelling of 53381278173 in words is "fifty-three billion, three hundred eighty-one million, two hundred seventy-eight thousand, one hundred seventy-three".