2638905091200 has 1920 divisors, whose sum is σ = 11465939168640. Its totient is φ = 585252864000.

The previous prime is 2638905091157. The next prime is 2638905091213. The reversal of 2638905091200 is 21905098362.

2638905091200 is a `hidden beast` number, since 2 + 6 + 38 + 90 + 509 + 1 + 20 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a super-2 number, since 2×2638905091200² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 12506659095 + ... + 12506659305.

It is an arithmetic number, because the mean of its divisors is an integer number (5971843317).

Almost surely, 2^{2638905091200} is an apocalyptic number.

2638905091200 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 2638905091200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5732969584320).

2638905091200 is an abundant number, since it is smaller than the sum of its proper divisors (8827034077440).

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

2638905091200 is a wasteful number, since it uses less digits than its factorization.

2638905091200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 2638905091200 in words is "two trillion, six hundred thirty-eight billion, nine hundred five million, ninety-one thousand, two hundred".