55250252640 has 288 divisors, whose sum is σ = 209171289600. Its totient is φ = 13166760960.

The previous prime is 55250252639. The next prime is 55250252693. The reversal of 55250252640 is 4625205255.

55250252640 is a `hidden beast` number, since 5 + 5 + 2 + 5 + 0 + 2 + 5 + 2 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55250252595 and 55250252604.

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, 905001 + ... + 964119.

It is an arithmetic number, because the mean of its divisors is an integer number (726289200).

Almost surely, 2^55250252640 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 55250252640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104585644800).

55250252640 is an abundant number, since it is smaller than the sum of its proper divisors (153921036960).

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

55250252640 is a wasteful number, since it uses less digits than its factorization.

55250252640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59210 (or 59199 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

Adding to 55250252640 its reverse (4625205255), we get a palindrome (59875457895).

The spelling of 55250252640 in words is "fifty-five billion, two hundred fifty million, two hundred fifty-two thousand, six hundred forty".