1620115912 has 32 divisors (see below), whose sum is σ = 3218400000. Its totient is φ = 761935104.

The previous prime is 1620115909. The next prime is 1620115949. The reversal of 1620115912 is 2195110261.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321589 + ... + 326587.

It is an arithmetic number, because the mean of its divisors is an integer number (100575000).

Almost surely, 2^1620115912 is an apocalyptic number.

It is an amenable number.

1620115912 is a deficient number, since it is larger than the sum of its proper divisors (1598284088).

1620115912 is a wasteful number, since it uses less digits than its factorization.

1620115912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7405 (or 7401 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 1620115912 is about 40250.6634976369. The cubic root of 1620115912 is about 1174.4883028022.

The spelling of 1620115912 in words is "one billion, six hundred twenty million, one hundred fifteen thousand, nine hundred twelve".