2640718156340 has 48 divisors (see below), whose sum is σ = 6051692594304. Its totient is φ = 959936169600.

The previous prime is 2640718156333. The next prime is 2640718156381. The reversal of 2640718156340 is 436518170462.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1379096 + ... + 2680175.

It is an arithmetic number, because the mean of its divisors is an integer number (126076929048).

Almost surely, 2^{2640718156340} is an apocalyptic number.

2640718156340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640718156340 is an abundant number, since it is smaller than the sum of its proper divisors (3410974437964).

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

2640718156340 is a wasteful number, since it uses less digits than its factorization.

2640718156340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062248 (or 4062246 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 2640718156340 in words is "two trillion, six hundred forty billion, seven hundred eighteen million, one hundred fifty-six thousand, three hundred forty".