55369221390 has 144 divisors (see below), whose sum is σ = 168013237392. Its totient is φ = 12614289408.

The previous prime is 55369221353. The next prime is 55369221407. The reversal of 55369221390 is 9312296355.

55369221390 is a `hidden beast` number, since 5 + 5 + 36 + 9 + 221 + 390 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1333422 + ... + 1374318.

It is an arithmetic number, because the mean of its divisors is an integer number (1166758593).

Almost surely, 2^55369221390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55369221390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84006618696).

55369221390 is an abundant number, since it is smaller than the sum of its proper divisors (112644016002).

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

55369221390 is a wasteful number, since it uses less digits than its factorization.

55369221390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41231 (or 41221 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 45.

The spelling of 55369221390 in words is "fifty-five billion, three hundred sixty-nine million, two hundred twenty-one thousand, three hundred ninety".