53179386440 has 16 divisors (see below), whose sum is σ = 119653619580. Its totient is φ = 21271754560.

The previous prime is 53179386433. The next prime is 53179386443. The reversal of 53179386440 is 4468397135.

It can be written as a sum of positive squares in 2 ways, for example, as 52641795844 + 537590596 = 229438^2 + 23186^2 .

It is not an unprimeable number, because it can be changed into a prime (53179386443) 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, 664742291 + ... + 664742370.

Almost surely, 2^53179386440 is an apocalyptic number.

It is an amenable number.

53179386440 is an abundant number, since it is smaller than the sum of its proper divisors (66474233140).

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

53179386440 is a wasteful number, since it uses less digits than its factorization.

53179386440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329484672 (or 1329484668 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 53179386440 in words is "fifty-three billion, one hundred seventy-nine million, three hundred eighty-six thousand, four hundred forty".