2091620588928 has 128 divisors (see below), whose sum is σ = 5996340561120. Its totient is φ = 642166603776.

The previous prime is 2091620588891. The next prime is 2091620588951. The reversal of 2091620588928 is 8298850261902.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1822926 + ... + 2739762.

Almost surely, 2^{2091620588928} 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 2091620588928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2998170280560).

2091620588928 is an abundant number, since it is smaller than the sum of its proper divisors (3904719972192).

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

2091620588928 is a wasteful number, since it uses less digits than its factorization.

2091620588928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917324 (or 917312 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 60.

The spelling of 2091620588928 in words is "two trillion, ninety-one billion, six hundred twenty million, five hundred eighty-eight thousand, nine hundred twenty-eight".