55585259856 has 400 divisors, whose sum is σ = 195359281920. Its totient is φ = 14895083520.

The previous prime is 55585259843. The next prime is 55585259893. The reversal of 55585259856 is 65895258555.

55585259856 is a `hidden beast` number, since 5 + 5 + 58 + 525 + 9 + 8 + 56 = 666.

It is a super-2 number, since 2×55585259856² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 55585259793 and 55585259802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 67703926 + ... + 67704746.

Almost surely, 2^55585259856 is an apocalyptic number.

55585259856 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55585259856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97679640960).

55585259856 is an abundant number, since it is smaller than the sum of its proper divisors (139774022064).

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

55585259856 is a wasteful number, since it uses less digits than its factorization.

55585259856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304 (or 1289 counting only the distinct ones).

The product of its digits is 108000000, while the sum is 63.

The spelling of 55585259856 in words is "fifty-five billion, five hundred eighty-five million, two hundred fifty-nine thousand, eight hundred fifty-six".