1921053936384 has 360 divisors, whose sum is σ = 6284027977920. Its totient is φ = 578873088000.

The previous prime is 1921053936353. The next prime is 1921053936391. The reversal of 1921053936384 is 4836393501291.

1921053936384 is a `hidden beast` number, since 1 + 9 + 21 + 0 + 539 + 3 + 6 + 3 + 84 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1921053936384.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40805659 + ... + 40852709.

It is an arithmetic number, because the mean of its divisors is an integer number (17455633272).

Almost surely, 2^{1921053936384} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1921053936384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3142013988960).

1921053936384 is an abundant number, since it is smaller than the sum of its proper divisors (4362974041536).

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

1921053936384 is a wasteful number, since it uses less digits than its factorization.

1921053936384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47269 (or 47246 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 1921053936384 in words is "one trillion, nine hundred twenty-one billion, fifty-three million, nine hundred thirty-six thousand, three hundred eighty-four".