1640734305641 has 16 divisors (see below), whose sum is σ = 1749332371200. Its totient is φ = 1534369195008.

The previous prime is 1640734305601. The next prime is 1640734305643. The reversal of 1640734305641 is 1465034370461.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1640734305641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1640734305592 and 1640734305601.

It is not an unprimeable number, because it can be changed into a prime (1640734305643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6897215 + ... + 7131131.

It is an arithmetic number, because the mean of its divisors is an integer number (109333273200).

Almost surely, 2^{1640734305641} is an apocalyptic number.

It is an amenable number.

1640734305641 is a deficient number, since it is larger than the sum of its proper divisors (108598065559).

1640734305641 is a wasteful number, since it uses less digits than its factorization.

1640734305641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238688.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 1640734305641 in words is "one trillion, six hundred forty billion, seven hundred thirty-four million, three hundred five thousand, six hundred forty-one".