6556255380 has 36 divisors (see below), whose sum is σ = 19887308532. Its totient is φ = 1748334720.

The previous prime is 6556255369. The next prime is 6556255427. The reversal of 6556255380 is 835526556.

6556255380 is a `hidden beast` number, since 6 + 5 + 562 + 5 + 5 + 3 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1312467984 + 5243787396 = 36228^2 + 72414^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18211641 + ... + 18212000.

It is an arithmetic number, because the mean of its divisors is an integer number (552425237).

Almost surely, 2^6556255380 is an apocalyptic number.

6556255380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6556255380 is an abundant number, since it is smaller than the sum of its proper divisors (13331053152).

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

6556255380 is a wasteful number, since it uses less digits than its factorization.

6556255380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36423656 (or 36423651 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The square root of 6556255380 is about 80970.7069254061. The cubic root of 6556255380 is about 1871.6240650150.

The spelling of 6556255380 in words is "six billion, five hundred fifty-six million, two hundred fifty-five thousand, three hundred eighty".