1921289226032 has 80 divisors (see below), whose sum is σ = 4306312771200. Its totient is φ = 820693816320.

The previous prime is 1921289226023. The next prime is 1921289226053. The reversal of 1921289226032 is 2306229821291.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1484519 + ... + 2458937.

It is an arithmetic number, because the mean of its divisors is an integer number (53828909640).

Almost surely, 2^{1921289226032} 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 1921289226032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2153156385600).

1921289226032 is an abundant number, since it is smaller than the sum of its proper divisors (2385023545168).

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

1921289226032 is a wasteful number, since it uses less digits than its factorization.

1921289226032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975114 (or 975108 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 1921289226032 in words is "one trillion, nine hundred twenty-one billion, two hundred eighty-nine million, two hundred twenty-six thousand, thirty-two".