1921292875040 has 192 divisors, whose sum is σ = 5736605172480. Its totient is φ = 590640906240.

The previous prime is 1921292874979. The next prime is 1921292875069. The reversal of 1921292875040 is 405782921291.

It is a self number, because there is not a number n which added to its sum of digits gives 1921292875040.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168785 + ... + 1967504.

It is an arithmetic number, because the mean of its divisors is an integer number (29878151940).

Almost surely, 2^{1921292875040} is an apocalyptic number.

1921292875040 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 1921292875040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2868302586240).

1921292875040 is an abundant number, since it is smaller than the sum of its proper divisors (3815312297440).

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

1921292875040 is a wasteful number, since it uses less digits than its factorization.

1921292875040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136395 (or 2136387 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 1921292875040 in words is "one trillion, nine hundred twenty-one billion, two hundred ninety-two million, eight hundred seventy-five thousand, forty".