1616651556 has 48 divisors (see below), whose sum is σ = 4276171200. Its totient is φ = 471249792.

The previous prime is 1616651549. The next prime is 1616651591. The reversal of 1616651556 is 6551566161.

It is a super-2 number, since 2×1616651556² = 5227124507034442272, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 269751 + ... + 275678.

It is an arithmetic number, because the mean of its divisors is an integer number (89086900).

Almost surely, 2^1616651556 is an apocalyptic number.

It is an amenable number.

1616651556 is an abundant number, since it is smaller than the sum of its proper divisors (2659519644).

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

1616651556 is a wasteful number, since it uses less digits than its factorization.

1616651556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545468 (or 545466 counting only the distinct ones).

The product of its digits is 162000, while the sum is 42.

The square root of 1616651556 is about 40207.6056984248. The cubic root of 1616651556 is about 1173.6505542584.

The spelling of 1616651556 in words is "one billion, six hundred sixteen million, six hundred fifty-one thousand, five hundred fifty-six".