1912999680 has 180 divisors, whose sum is σ = 6845433672. Its totient is φ = 510105600.

The previous prime is 1912999651. The next prime is 1912999727. The reversal of 1912999680 is 869992191.

1912999680 is a `hidden beast` number, since 191 + 299 + 96 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 94455 + ... + 112905.

Almost surely, 2^1912999680 is an apocalyptic number.

1912999680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1912999680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3422716836).

1912999680 is an abundant number, since it is smaller than the sum of its proper divisors (4932433992).

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

1912999680 is an equidigital number, since it uses as much as digits as its factorization.

1912999680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18484 (or 18461 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 54.

The square root of 1912999680 is about 43737.8517990996. The cubic root of 1912999680 is about 1241.3806335618.

The spelling of 1912999680 in words is "one billion, nine hundred twelve million, nine hundred ninety-nine thousand, six hundred eighty".