55661224740 has 48 divisors (see below), whose sum is σ = 170019743040. Its totient is φ = 13493630080.

The previous prime is 55661224721. The next prime is 55661224771. The reversal of 55661224740 is 4742216655.

It is a junction number, because it is equal to n+sod(n) for n = 55661224692 and 55661224701.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 42166935 + ... + 42168254.

It is an arithmetic number, because the mean of its divisors is an integer number (3542077980).

Almost surely, 2^55661224740 is an apocalyptic number.

It is an amenable number.

55661224740 is an abundant number, since it is smaller than the sum of its proper divisors (114358518300).

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

55661224740 is a wasteful number, since it uses less digits than its factorization.

55661224740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84335212 (or 84335210 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 42.

It can be divided in two parts, 55 and 661224740, that added together give a triangular number (661224795 = T₃₆₃₆₅).

The spelling of 55661224740 in words is "fifty-five billion, six hundred sixty-one million, two hundred twenty-four thousand, seven hundred forty".