55440221040 has 160 divisors (see below), whose sum is σ = 197545838400. Its totient is φ = 14274247680.

The previous prime is 55440221021. The next prime is 55440221047. The reversal of 55440221040 is 4012204455.

55440221040 is a `hidden beast` number, since 5 + 5 + 4 + 402 + 210 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 55440220995 and 55440221013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55440221047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 379891 + ... + 505170.

It is an arithmetic number, because the mean of its divisors is an integer number (1234661490).

Almost surely, 2^55440221040 is an apocalyptic number.

It is an amenable number.

55440221040 is an abundant number, since it is smaller than the sum of its proper divisors (142105617360).

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

55440221040 is a wasteful number, since it uses less digits than its factorization.

55440221040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885112 (or 885100 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 55440221040 its reverse (4012204455), we get a palindrome (59452425495).

The spelling of 55440221040 in words is "fifty-five billion, four hundred forty million, two hundred twenty-one thousand, forty".