1656506655 has 12 divisors (see below), whose sum is σ = 2871278280. Its totient is φ = 883470192.

The previous prime is 1656506653. The next prime is 1656506699. The reversal of 1656506655 is 5566056561.

1656506655 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1656506655 - 2¹ = 1656506653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 36811259 = 1656506655 / (1 + 6 + 5 + 6 + 5 + 0 + 6 + 6 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1656506655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656506653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18405585 + ... + 18405674.

It is an arithmetic number, because the mean of its divisors is an integer number (239273190).

Almost surely, 2^1656506655 is an apocalyptic number.

1656506655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1656506655 is a deficient number, since it is larger than the sum of its proper divisors (1214771625).

1656506655 is a wasteful number, since it uses less digits than its factorization.

1656506655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36811270 (or 36811267 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The square root of 1656506655 is about 40700.2046063653. The cubic root of 1656506655 is about 1183.2169841743.

The spelling of 1656506655 in words is "one billion, six hundred fifty-six million, five hundred six thousand, six hundred fifty-five".