2650641226640 has 120 divisors (see below), whose sum is σ = 6776634210360. Its totient is φ = 963483586560.

The previous prime is 2650641226619. The next prime is 2650641226657. The reversal of 2650641226640 is 466221460562.

It can be written as a sum of positive squares in 4 ways, for example, as 7129438096 + 2643511788544 = 84436^2 + 1625888^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 2650641226591 and 2650641226600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24698216 + ... + 24805304.

It is an arithmetic number, because the mean of its divisors is an integer number (56471951753).

Almost surely, 2^{2650641226640} is an apocalyptic number.

2650641226640 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 2650641226640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3388317105180).

2650641226640 is an abundant number, since it is smaller than the sum of its proper divisors (4125992983720).

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

2650641226640 is a wasteful number, since it uses less digits than its factorization.

2650641226640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109681 (or 109664 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 2650641226640 in words is "two trillion, six hundred fifty billion, six hundred forty-one million, two hundred twenty-six thousand, six hundred forty".