55065387520 has 320 divisors, whose sum is σ = 155915020800. Its totient is φ = 18387763200.

The previous prime is 55065387467. The next prime is 55065387571. The reversal of 55065387520 is 2578356055.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (320).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127761705 + ... + 127762135.

It is an arithmetic number, because the mean of its divisors is an integer number (487234440).

Almost surely, 2^55065387520 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 55065387520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77957510400).

55065387520 is an abundant number, since it is smaller than the sum of its proper divisors (100849633280).

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

55065387520 is a wasteful number, since it uses less digits than its factorization.

55065387520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 1260000, while the sum is 46.

The spelling of 55065387520 in words is "fifty-five billion, sixty-five million, three hundred eighty-seven thousand, five hundred twenty".