1916873994240 has 1040 divisors, whose sum is σ = 7359118108320. Its totient is φ = 475846410240.

The previous prime is 1916873994239. The next prime is 1916873994253. The reversal of 1916873994240 is 424993786191.

1916873994240 is a `hidden beast` number, since 1 + 9 + 168 + 7 + 399 + 42 + 40 = 666.

It is a super-2 number, since 2×1916873994240² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1922641422 + ... + 1922642418.

Almost surely, 2^{1916873994240} is an apocalyptic number.

1916873994240 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 1916873994240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3679559054160).

1916873994240 is an abundant number, since it is smaller than the sum of its proper divisors (5442244114080).

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

1916873994240 is an equidigital number, since it uses as much as digits as its factorization.

1916873994240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1087 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 1916873994240 in words is "one trillion, nine hundred sixteen billion, eight hundred seventy-three million, nine hundred ninety-four thousand, two hundred forty".