2091554400 has 288 divisors, whose sum is σ = 7507019520. Its totient is φ = 502548480.

The previous prime is 2091554393. The next prime is 2091554401. The reversal of 2091554400 is 44551902.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091554401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1340821 + ... + 1342379.

It is an arithmetic number, because the mean of its divisors is an integer number (26066040).

Almost surely, 2^2091554400 is an apocalyptic number.

2091554400 is a gapful number since it is divisible by the number (20) 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 2091554400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3753509760).

2091554400 is an abundant number, since it is smaller than the sum of its proper divisors (5415465120).

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

2091554400 is a wasteful number, since it uses less digits than its factorization.

2091554400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2091554400 is about 45733.5150628071. The cubic root of 2091554400 is about 1278.8601506217.

The spelling of 2091554400 in words is "two billion, ninety-one million, five hundred fifty-four thousand, four hundred".