55736550 has 72 divisors (see below), whose sum is σ = 154945440. Its totient is φ = 14347200.

The previous prime is 55736537. The next prime is 55736573. The reversal of 55736550 is 5563755.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10915 + ... + 15185.

It is an arithmetic number, because the mean of its divisors is an integer number (2152020).

Almost surely, 2^55736550 is an apocalyptic number.

55736550 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 55736550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77472720).

55736550 is an abundant number, since it is smaller than the sum of its proper divisors (99208890).

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

55736550 is a wasteful number, since it uses less digits than its factorization.

55736550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4318 (or 4310 counting only the distinct ones).

The product of its (nonzero) digits is 78750, while the sum is 36.

The square root of 55736550 is about 7465.6915285859. The cubic root of 55736550 is about 381.9853388377.

The spelling of 55736550 in words is "fifty-five million, seven hundred thirty-six thousand, five hundred fifty".