55668156544 has 384 divisors, whose sum is σ = 157690368000. Its totient is φ = 18956021760.

The previous prime is 55668156521. The next prime is 55668156569. The reversal of 55668156544 is 44565186655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31646737 + ... + 31648495.

It is an arithmetic number, because the mean of its divisors is an integer number (410652000).

Almost surely, 2^55668156544 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 55668156544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78845184000).

55668156544 is an abundant number, since it is smaller than the sum of its proper divisors (102022211456).

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

55668156544 is a wasteful number, since it uses less digits than its factorization.

55668156544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836 (or 1811 counting only the distinct ones).

The product of its digits is 17280000, while the sum is 55.

It can be divided in two parts, 55668 and 156544, that added together give a palindrome (212212).

The spelling of 55668156544 in words is "fifty-five billion, six hundred sixty-eight million, one hundred fifty-six thousand, five hundred forty-four".