55309643508 has 48 divisors (see below), whose sum is σ = 148653768704. Its totient is φ = 15678321120.

The previous prime is 55309643503. The next prime is 55309643509. The reversal of 55309643508 is 80534690355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55309643503) 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 15 ways as a sum of consecutive naturals, for example, 2581648 + ... + 2602983.

Almost surely, 2^55309643508 is an apocalyptic number.

It is an amenable number.

55309643508 is an abundant number, since it is smaller than the sum of its proper divisors (93344125196).

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

55309643508 is a wasteful number, since it uses less digits than its factorization.

55309643508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5184772 (or 5184770 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 55309643508 in words is "fifty-five billion, three hundred nine million, six hundred forty-three thousand, five hundred eight".