55005555620 has 48 divisors (see below), whose sum is σ = 117893089776. Its totient is φ = 21551616000.

The previous prime is 55005555611. The next prime is 55005555629. The reversal of 55005555620 is 2655550055.

It is a happy number.

55005555620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55005555611) and next prime (55005555629).

It can be written as a sum of positive squares in 8 ways, for example, as 16831429696 + 38174125924 = 129736^2 + 195382^2 .

It is a super-2 number, since 2×55005555620² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55005555629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200480 + ... + 387560.

It is an arithmetic number, because the mean of its divisors is an integer number (2456106037).

Almost surely, 2^55005555620 is an apocalyptic number.

It is an amenable number.

55005555620 is an abundant number, since it is smaller than the sum of its proper divisors (62887534156).

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

55005555620 is a wasteful number, since it uses less digits than its factorization.

55005555620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187392 (or 187390 counting only the distinct ones).

The product of its (nonzero) digits is 187500, while the sum is 38.

The spelling of 55005555620 in words is "fifty-five billion, five million, five hundred fifty-five thousand, six hundred twenty".