55547657550 has 360 divisors, whose sum is σ = 193893871248. Its totient is φ = 11541657600.

The previous prime is 55547657519. The next prime is 55547657563. The reversal of 55547657550 is 5575674555.

55547657550 is a `hidden beast` number, since 5 + 55 + 476 + 5 + 75 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 3422254 + ... + 3438446.

Almost surely, 2^55547657550 is an apocalyptic number.

55547657550 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 55547657550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96946935624).

55547657550 is an abundant number, since it is smaller than the sum of its proper divisors (138346213698).

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

55547657550 is a wasteful number, since it uses less digits than its factorization.

55547657550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16246 (or 16221 counting only the distinct ones).

The product of its (nonzero) digits is 18375000, while the sum is 54.

The spelling of 55547657550 in words is "fifty-five billion, five hundred forty-seven million, six hundred fifty-seven thousand, five hundred fifty".