55780830550 has 48 divisors (see below), whose sum is σ = 104166524880. Its totient is φ = 22223421440.

The previous prime is 55780830541. The next prime is 55780830557. The reversal of 55780830550 is 5503808755.

It is a super-2 number, since 2×55780830550² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55780830550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55780830557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24867729 + ... + 24869971.

It is an arithmetic number, because the mean of its divisors is an integer number (2170135935).

Almost surely, 2^55780830550 is an apocalyptic number.

55780830550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55780830550 is a deficient number, since it is larger than the sum of its proper divisors (48385694330).

55780830550 is a wasteful number, since it uses less digits than its factorization.

55780830550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4017 (or 4012 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 46.

The spelling of 55780830550 in words is "fifty-five billion, seven hundred eighty million, eight hundred thirty thousand, five hundred fifty".