1640446105321 has 16 divisors (see below), whose sum is σ = 1659204518400. Its totient is φ = 1621758526848.

The previous prime is 1640446105303. The next prime is 1640446105367. The reversal of 1640446105321 is 1235016440461.

It is a cyclic number.

It is not a de Polignac number, because 1640446105321 - 2²³ = 1640437716713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640446105301) 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, 122992965 + ... + 123006301.

It is an arithmetic number, because the mean of its divisors is an integer number (103700282400).

Almost surely, 2^{1640446105321} is an apocalyptic number.

It is an amenable number.

1640446105321 is a deficient number, since it is larger than the sum of its proper divisors (18758413079).

1640446105321 is a wasteful number, since it uses less digits than its factorization.

1640446105321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15888.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 1640446105321 in words is "one trillion, six hundred forty billion, four hundred forty-six million, one hundred five thousand, three hundred twenty-one".