55012116720 has 160 divisors (see below), whose sum is σ = 188590143744. Its totient is φ = 13153536000.

The previous prime is 55012116641. The next prime is 55012116737. The reversal of 55012116720 is 2761121055.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 49995 + ... + 335445.

Almost surely, 2^55012116720 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 55012116720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94295071872).

55012116720 is an abundant number, since it is smaller than the sum of its proper divisors (133578027024).

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

55012116720 is a wasteful number, since it uses less digits than its factorization.

55012116720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285551 (or 285545 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

Adding to 55012116720 its reverse (2761121055), we get a palindrome (57773237775).

The spelling of 55012116720 in words is "fifty-five billion, twelve million, one hundred sixteen thousand, seven hundred twenty".