55731886056 has 640 divisors, whose sum is σ = 203133173760. Its totient is φ = 13853721600.

The previous prime is 55731886051. The next prime is 55731886061. The reversal of 55731886056 is 65068813755.

55731886056 is a `hidden beast` number, since 5 + 573 + 1 + 8 + 8 + 60 + 5 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (55731886051) and next prime (55731886061).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 55731885993 and 55731886011.

It is not an unprimeable number, because it can be changed into a prime (55731886051) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 211908181 + ... + 211908443.

It is an arithmetic number, because the mean of its divisors is an integer number (317395584).

Almost surely, 2^55731886056 is an apocalyptic number.

55731886056 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 55731886056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101566586880).

55731886056 is an abundant number, since it is smaller than the sum of its proper divisors (147401287704).

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

55731886056 is a wasteful number, since it uses less digits than its factorization.

55731886056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 55731886056 in words is "fifty-five billion, seven hundred thirty-one million, eight hundred eighty-six thousand, fifty-six".