1656610120 has 32 divisors (see below), whose sum is σ = 4066225920. Its totient is φ = 602403520.

The previous prime is 1656610117. The next prime is 1656610177. The reversal of 1656610120 is 210166561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1882072 + ... + 1882951.

It is an arithmetic number, because the mean of its divisors is an integer number (127069560).

Almost surely, 2^1656610120 is an apocalyptic number.

1656610120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656610120 is an abundant number, since it is smaller than the sum of its proper divisors (2409615800).

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

1656610120 is a wasteful number, since it uses less digits than its factorization.

1656610120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765045 (or 3765041 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1656610120 is about 40701.4756489246. The cubic root of 1656610120 is about 1183.2416181424.

Adding to 1656610120 its reverse (210166561), we get a palindrome (1866776681).

The spelling of 1656610120 in words is "one billion, six hundred fifty-six million, six hundred ten thousand, one hundred twenty".