1655562240 has 280 divisors, whose sum is σ = 5947029000. Its totient is φ = 440598528.

The previous prime is 1655562211. The next prime is 1655562257. The reversal of 1655562240 is 422655561.

1655562240 is a `hidden beast` number, since 1 + 6 + 55 + 562 + 2 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1655562195 and 1655562204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3317511 + ... + 3318009.

Almost surely, 2^1655562240 is an apocalyptic number.

1655562240 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 1655562240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2973514500).

1655562240 is an abundant number, since it is smaller than the sum of its proper divisors (4291466760).

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

1655562240 is an frugal number, since it uses more digits than its factorization.

1655562240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1655562240 is about 40688.6008606833. The cubic root of 1655562240 is about 1182.9920811042.

The spelling of 1655562240 in words is "one billion, six hundred fifty-five million, five hundred sixty-two thousand, two hundred forty".