55556684240 has 20 divisors (see below), whose sum is σ = 129169291044. Its totient is φ = 22222673664.

The previous prime is 55556684213. The next prime is 55556684251. The reversal of 55556684240 is 4248665555.

It can be written as a sum of positive squares in 2 ways, for example, as 6473167936 + 49083516304 = 80456^2 + 221548^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347229197 + ... + 347229356.

Almost surely, 2^55556684240 is an apocalyptic number.

It is an amenable number.

55556684240 is an abundant number, since it is smaller than the sum of its proper divisors (73612606804).

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

55556684240 is a wasteful number, since it uses less digits than its factorization.

55556684240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694458566 (or 694458560 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 50.

The spelling of 55556684240 in words is "fifty-five billion, five hundred fifty-six million, six hundred eighty-four thousand, two hundred forty".