55555506512 has 80 divisors (see below), whose sum is σ = 122873956992. Its totient is φ = 24106268160.

The previous prime is 55555506511. The next prime is 55555506527. The reversal of 55555506512 is 21560555555.

It is a super-2 number, since 2×55555506512² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555506511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264653 + ... + 425619.

Almost surely, 2^55555506512 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 55555506512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61436978496).

55555506512 is an abundant number, since it is smaller than the sum of its proper divisors (67318450480).

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

55555506512 is a wasteful number, since it uses less digits than its factorization.

55555506512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161076 (or 161070 counting only the distinct ones).

The product of its (nonzero) digits is 937500, while the sum is 44.

The spelling of 55555506512 in words is "fifty-five billion, five hundred fifty-five million, five hundred six thousand, five hundred twelve".