1640195067329 has 24 divisors (see below), whose sum is σ = 2058169229928. Its totient is φ = 1295577158400.

The previous prime is 1640195067293. The next prime is 1640195067397. The reversal of 1640195067329 is 9237605910461.

It can be written as a sum of positive squares in 4 ways, for example, as 76494836929 + 1563700230400 = 276577^2 + 1250480^2 .

It is not a de Polignac number, because 1640195067329 - 2²⁸ = 1639926631873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1640195069329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1759322 + ... + 2524995.

It is an arithmetic number, because the mean of its divisors is an integer number (85757051247).

Almost surely, 2^{1640195067329} is an apocalyptic number.

It is an amenable number.

1640195067329 is a deficient number, since it is larger than the sum of its proper divisors (417974162599).

1640195067329 is a wasteful number, since it uses less digits than its factorization.

1640195067329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4284945 (or 4284938 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 1640195067329 in words is "one trillion, six hundred forty billion, one hundred ninety-five million, sixty-seven thousand, three hundred twenty-nine".