1655116220 has 36 divisors (see below), whose sum is σ = 3660431880. Its totient is φ = 626901408.

The previous prime is 1655116207. The next prime is 1655116223. The reversal of 1655116220 is 226115561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655116223) 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, 792017 + ... + 794103.

Almost surely, 2^1655116220 is an apocalyptic number.

1655116220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1655116220 is an abundant number, since it is smaller than the sum of its proper divisors (2005315660).

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

1655116220 is an equidigital number, since it uses as much as digits as its factorization.

1655116220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202 (or 2113 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1655116220 is about 40683.1195952326. The cubic root of 1655116220 is about 1182.8858361268.

The spelling of 1655116220 in words is "one billion, six hundred fifty-five million, one hundred sixteen thousand, two hundred twenty".