2640028721722 has 24 divisors (see below), whose sum is σ = 4693497355476. Its totient is φ = 1110092937408.

The previous prime is 2640028721717. The next prime is 2640028721723. The reversal of 2640028721722 is 2271278200462.

It can be written as a sum of positive squares in 2 ways, for example, as 2600153025001 + 39875696721 = 1612499^2 + 199689^2 .

It is not an unprimeable number, because it can be changed into a prime (2640028721723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254136963 + ... + 254147350.

Almost surely, 2^{2640028721722} is an apocalyptic number.

2640028721722 is a deficient number, since it is larger than the sum of its proper divisors (2053468633754).

2640028721722 is a wasteful number, since it uses less digits than its factorization.

2640028721722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508284382 (or 508284375 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 2640028721722 in words is "two trillion, six hundred forty billion, twenty-eight million, seven hundred twenty-one thousand, seven hundred twenty-two".