1655842680 has 192 divisors, whose sum is σ = 5797509120. Its totient is φ = 408672000.

The previous prime is 1655842679. The next prime is 1655842697. The reversal of 1655842680 is 862485561.

1655842680 is a `hidden beast` number, since 1 + 6 + 5 + 584 + 2 + 68 + 0 = 666.

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 47 ways as a sum of consecutive naturals, for example, 253455 + ... + 259905.

It is an arithmetic number, because the mean of its divisors is an integer number (30195360).

Almost surely, 2^1655842680 is an apocalyptic number.

1655842680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1655842680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2898754560).

1655842680 is an abundant number, since it is smaller than the sum of its proper divisors (4141666440).

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

1655842680 is a wasteful number, since it uses less digits than its factorization.

1655842680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6522 (or 6515 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 1655842680 is about 40692.0468887963. The cubic root of 1655842680 is about 1183.0588740363.

The spelling of 1655842680 in words is "one billion, six hundred fifty-five million, eight hundred forty-two thousand, six hundred eighty".