55251380352 has 384 divisors, whose sum is σ = 176286257280. Its totient is φ = 15016181760.

The previous prime is 55251380333. The next prime is 55251380357. The reversal of 55251380352 is 25308315255.

It is a tau number, because it is divible by the number of its divisors (384).

It is a self number, because there is not a number n which added to its sum of digits gives 55251380352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55251380357) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 188571118 + ... + 188571410.

It is an arithmetic number, because the mean of its divisors is an integer number (459078795).

Almost surely, 2^55251380352 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 55251380352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88143128640).

55251380352 is an abundant number, since it is smaller than the sum of its proper divisors (121034876928).

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

55251380352 is a wasteful number, since it uses less digits than its factorization.

55251380352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 55251380352 in words is "fifty-five billion, two hundred fifty-one million, three hundred eighty thousand, three hundred fifty-two".