55783705356 has 72 divisors (see below), whose sum is σ = 144222833664. Its totient is φ = 18171917280.

The previous prime is 55783705343. The next prime is 55783705409. The reversal of 55783705356 is 65350738755.

55783705356 is a `hidden beast` number, since 5 + 5 + 78 + 37 + 0 + 535 + 6 = 666.

It is a super-2 number, since 2×55783705356² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1131501 + ... + 1179771.

It is an arithmetic number, because the mean of its divisors is an integer number (2003094912).

Almost surely, 2^55783705356 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 55783705356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72111416832).

55783705356 is an abundant number, since it is smaller than the sum of its proper divisors (88439128308).

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

55783705356 is a wasteful number, since it uses less digits than its factorization.

55783705356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49011 (or 49006 counting only the distinct ones).

The product of its (nonzero) digits is 13230000, while the sum is 54.

The spelling of 55783705356 in words is "fifty-five billion, seven hundred eighty-three million, seven hundred five thousand, three hundred fifty-six".