55447131488 has 72 divisors (see below), whose sum is σ = 127064920752. Its totient is φ = 23747883264.

The previous prime is 55447131461. The next prime is 55447131491. The reversal of 55447131488 is 88413174455.

It is a super-2 number, since 2×55447131488² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2644181 + ... + 2665067.

It is an arithmetic number, because the mean of its divisors is an integer number (1764790566).

Almost surely, 2^55447131488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55447131488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63532460376).

55447131488 is an abundant number, since it is smaller than the sum of its proper divisors (71617789264).

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

55447131488 is a wasteful number, since it uses less digits than its factorization.

55447131488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22604 (or 22589 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 50.

The spelling of 55447131488 in words is "fifty-five billion, four hundred forty-seven million, one hundred thirty-one thousand, four hundred eighty-eight".