6121655616 has 28 divisors (see below), whose sum is σ = 16196880992. Its totient is φ = 2040551808.

The previous prime is 6121655563. The next prime is 6121655627. The reversal of 6121655616 is 6165561216.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15941620 + ... + 15942003.

Almost surely, 2^6121655616 is an apocalyptic number.

It is an amenable number.

6121655616 is an abundant number, since it is smaller than the sum of its proper divisors (10075225376).

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

6121655616 is a wasteful number, since it uses less digits than its factorization.

6121655616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31883638 (or 31883628 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 6121655616 is about 78241.0098094343. The cubic root of 6121655616 is about 1829.3197842204.

The spelling of 6121655616 in words is "six billion, one hundred twenty-one million, six hundred fifty-five thousand, six hundred sixteen".