55504978337280 has 640 divisors, whose sum is σ = 180745007579136. Its totient is φ = 14529134592000.

The previous prime is 55504978337191. The next prime is 55504978337287. The reversal of 55504978337280 is 8273387940555.

It is a tau number, because it is divible by the number of its divisors (640).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55504978337287) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48223264705 + ... + 48223265855.

Almost surely, 2^{55504978337280} 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 55504978337280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90372503789568).

55504978337280 is an abundant number, since it is smaller than the sum of its proper divisors (125240029241856).

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

55504978337280 is a wasteful number, since it uses less digits than its factorization.

55504978337280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778 (or 1762 counting only the distinct ones).

The product of its (nonzero) digits is 254016000, while the sum is 66.

The spelling of 55504978337280 in words is "fifty-five trillion, five hundred four billion, nine hundred seventy-eight million, three hundred thirty-seven thousand, two hundred eighty".