2665215239340 has 864 divisors, whose sum is σ = 8672947540992. Its totient is φ = 610665676800.

The previous prime is 2665215239321. The next prime is 2665215239347. The reversal of 2665215239340 is 439325125662.

It is a self number, because there is not a number n which added to its sum of digits gives 2665215239340.

It is not an unprimeable number, because it can be changed into a prime (2665215239347) by changing a digit.

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 287 ways as a sum of consecutive naturals, for example, 32111026939 + ... + 32111027021.

It is an arithmetic number, because the mean of its divisors is an integer number (10038133728).

Almost surely, 2^{2665215239340} is an apocalyptic number.

2665215239340 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 2665215239340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4336473770496).

2665215239340 is an abundant number, since it is smaller than the sum of its proper divisors (6007732301652).

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

2665215239340 is a wasteful number, since it uses less digits than its factorization.

2665215239340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 2665215239340 in words is "two trillion, six hundred sixty-five billion, two hundred fifteen million, two hundred thirty-nine thousand, three hundred forty".