1938927921264 has 240 divisors, whose sum is σ = 5901804260352. Its totient is φ = 615065197824.

The previous prime is 1938927921257. The next prime is 1938927921299. The reversal of 1938927921264 is 4621297298391.

1938927921264 is a `hidden beast` number, since 1 + 9 + 3 + 89 + 279 + 21 + 264 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17561497 + ... + 17671559.

Almost surely, 2^{1938927921264} 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 1938927921264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2950902130176).

1938927921264 is an abundant number, since it is smaller than the sum of its proper divisors (3962876339088).

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

1938927921264 is a wasteful number, since it uses less digits than its factorization.

1938927921264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110306 (or 110288 counting only the distinct ones).

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

The spelling of 1938927921264 in words is "one trillion, nine hundred thirty-eight billion, nine hundred twenty-seven million, nine hundred twenty-one thousand, two hundred sixty-four".