1621107912 has 32 divisors (see below), whose sum is σ = 4147022880. Its totient is φ = 527802240.

The previous prime is 1621107881. The next prime is 1621107923. The reversal of 1621107912 is 2197011261.

It is a self number, because there is not a number n which added to its sum of digits gives 1621107912.

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, 784389 + ... + 786452.

It is an arithmetic number, because the mean of its divisors is an integer number (129594465).

Almost surely, 2^1621107912 is an apocalyptic number.

1621107912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1621107912 is an abundant number, since it is smaller than the sum of its proper divisors (2525914968).

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

1621107912 is a wasteful number, since it uses less digits than its factorization.

1621107912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570893 (or 1570889 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 1621107912 is about 40262.9843901318. The cubic root of 1621107912 is about 1174.7279676872.

The spelling of 1621107912 in words is "one billion, six hundred twenty-one million, one hundred seven thousand, nine hundred twelve".