55242621240 has 128 divisors (see below), whose sum is σ = 174714347520. Its totient is φ = 13952793600.

The previous prime is 55242621211. The next prime is 55242621241. The reversal of 55242621240 is 4212624255.

55242621240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55242621241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16860 + ... + 332820.

It is an arithmetic number, because the mean of its divisors is an integer number (1364955840).

Almost surely, 2^55242621240 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 55242621240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87357173760).

55242621240 is an abundant number, since it is smaller than the sum of its proper divisors (119471726280).

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

55242621240 is a wasteful number, since it uses less digits than its factorization.

55242621240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316053 (or 316049 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 55242621240 in words is "fifty-five billion, two hundred forty-two million, six hundred twenty-one thousand, two hundred forty".