53531520444 has 36 divisors (see below), whose sum is σ = 135327154144. Its totient is φ = 17842341312.

The previous prime is 53531520443. The next prime is 53531520479. The reversal of 53531520444 is 44402513535.

53531520444 is a `hidden beast` number, since 535 + 31 + 52 + 0 + 4 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 53531520399 and 53531520408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53531520443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423984 + ... + 535560.

Almost surely, 2^53531520444 is an apocalyptic number.

It is an amenable number.

53531520444 is an abundant number, since it is smaller than the sum of its proper divisors (81795633700).

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

53531520444 is a wasteful number, since it uses less digits than its factorization.

53531520444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124914 (or 124909 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The spelling of 53531520444 in words is "fifty-three billion, five hundred thirty-one million, five hundred twenty thousand, four hundred forty-four".