2640380257663 has 8 divisors (see below), whose sum is σ = 2685975183360. Its totient is φ = 2594813422680.

The previous prime is 2640380257661. The next prime is 2640380257667. The reversal of 2640380257663 is 3667520830462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2640380257663 - 2¹ = 2640380257661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2640380257663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640380257661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6833023 + ... + 7209088.

It is an arithmetic number, because the mean of its divisors is an integer number (335746897920).

Almost surely, 2^{2640380257663} is an apocalyptic number.

2640380257663 is a deficient number, since it is larger than the sum of its proper divisors (45594925697).

2640380257663 is a wasteful number, since it uses less digits than its factorization.

2640380257663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14045357.

The product of its (nonzero) digits is 8709120, while the sum is 52.

The spelling of 2640380257663 in words is "two trillion, six hundred forty billion, three hundred eighty million, two hundred fifty-seven thousand, six hundred sixty-three".