55430543550 has 96 divisors (see below), whose sum is σ = 143699374080. Its totient is φ = 14123491200.

The previous prime is 55430543527. The next prime is 55430543599. The reversal of 55430543550 is 5534503455.

It is a junction number, because it is equal to n+sod(n) for n = 55430543499 and 55430543508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 291904 + ... + 442796.

It is an arithmetic number, because the mean of its divisors is an integer number (1496868480).

Almost surely, 2^55430543550 is an apocalyptic number.

55430543550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55430543550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71849687040).

55430543550 is an abundant number, since it is smaller than the sum of its proper divisors (88268830530).

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

55430543550 is a wasteful number, since it uses less digits than its factorization.

55430543550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151018 (or 151013 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 39.

The spelling of 55430543550 in words is "fifty-five billion, four hundred thirty million, five hundred forty-three thousand, five hundred fifty".