55520715012 has 96 divisors (see below), whose sum is σ = 151715773440. Its totient is φ = 15474975360.

The previous prime is 55520715011. The next prime is 55520715109. The reversal of 55520715012 is 21051702555.

It is not an unprimeable number, because it can be changed into a prime (55520715011) 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, 606478 + ... + 691994.

It is an arithmetic number, because the mean of its divisors is an integer number (1580372640).

Almost surely, 2^55520715012 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 55520715012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75857886720).

55520715012 is an abundant number, since it is smaller than the sum of its proper divisors (96195058428).

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

55520715012 is a wasteful number, since it uses less digits than its factorization.

55520715012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85721 (or 85719 counting only the distinct ones).

The product of its (nonzero) digits is 17500, while the sum is 33.

The spelling of 55520715012 in words is "fifty-five billion, five hundred twenty million, seven hundred fifteen thousand, twelve".