1912081668 has 48 divisors (see below), whose sum is σ = 5116352640. Its totient is φ = 544437504.

The previous prime is 1912081667. The next prime is 1912081693. The reversal of 1912081668 is 8661802191.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1912081667) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14233 + ... + 63456.

It is an arithmetic number, because the mean of its divisors is an integer number (106590680).

Almost surely, 2^1912081668 is an apocalyptic number.

It is an amenable number.

1912081668 is an abundant number, since it is smaller than the sum of its proper divisors (3204270972).

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

1912081668 is a wasteful number, since it uses less digits than its factorization.

1912081668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77996 (or 77994 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 1912081668 is about 43727.3560600227. The cubic root of 1912081668 is about 1241.1820301730.

The spelling of 1912081668 in words is "one billion, nine hundred twelve million, eighty-one thousand, six hundred sixty-eight".