55804731840 has 1344 divisors, whose sum is σ = 244070184960. Its totient is φ = 11827814400.

The previous prime is 55804731781. The next prime is 55804731841. The reversal of 55804731840 is 4813740855.

55804731840 is a `hidden beast` number, since 55 + 80 + 473 + 18 + 40 = 666.

It is a super-2 number, since 2×55804731840² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55804731841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1187334697 + ... + 1187334743.

It is an arithmetic number, because the mean of its divisors is an integer number (181599840).

Almost surely, 2^55804731840 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 55804731840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122035092480).

55804731840 is an abundant number, since it is smaller than the sum of its proper divisors (188265453120).

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

55804731840 is a wasteful number, since it uses less digits than its factorization.

55804731840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 55804731840 in words is "fifty-five billion, eight hundred four million, seven hundred thirty-one thousand, eight hundred forty".