55640850432 has 152 divisors (see below), whose sum is σ = 149736367200. Its totient is φ = 18377342976.

The previous prime is 55640850413. The next prime is 55640850437. The reversal of 55640850432 is 23405804655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55640850437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109313794 + ... + 109314302.

Almost surely, 2^55640850432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55640850432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74868183600).

55640850432 is an abundant number, since it is smaller than the sum of its proper divisors (94095516768).

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

55640850432 is an frugal number, since it uses more digits than its factorization.

55640850432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 55640850432 in words is "fifty-five billion, six hundred forty million, eight hundred fifty thousand, four hundred thirty-two".