1919398866084 has 384 divisors, whose sum is σ = 6235342848000. Its totient is φ = 497858586624.

The previous prime is 1919398866083. The next prime is 1919398866097. The reversal of 1919398866084 is 4806688939191.

1919398866084 is a `hidden beast` number, since 1 + 9 + 1 + 9 + 3 + 9 + 8 + 8 + 6 + 608 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (1919398866083) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 539306697 + ... + 539310255.

It is an arithmetic number, because the mean of its divisors is an integer number (16237872000).

Almost surely, 2^{1919398866084} is an apocalyptic number.

1919398866084 is a gapful number since it is divisible by the number (14) 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 1919398866084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3117671424000).

1919398866084 is an abundant number, since it is smaller than the sum of its proper divisors (4315943981916).

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

1919398866084 is a wasteful number, since it uses less digits than its factorization.

1919398866084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5072 (or 5064 counting only the distinct ones).

The product of its (nonzero) digits is 161243136, while the sum is 72.

The spelling of 1919398866084 in words is "one trillion, nine hundred nineteen billion, three hundred ninety-eight million, eight hundred sixty-six thousand, eighty-four".