1641330326545 has 32 divisors (see below), whose sum is σ = 2436810485760. Its totient is φ = 1033468623360.

The previous prime is 1641330326477. The next prime is 1641330326561. The reversal of 1641330326545 is 5456230331461.

It is not a de Polignac number, because 1641330326545 - 2²¹ = 1641328229393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9356340 + ... + 9530149.

It is an arithmetic number, because the mean of its divisors is an integer number (76150327680).

Almost surely, 2^{1641330326545} is an apocalyptic number.

It is an amenable number.

1641330326545 is a deficient number, since it is larger than the sum of its proper divisors (795480159215).

1641330326545 is a wasteful number, since it uses less digits than its factorization.

1641330326545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18886705.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 1641330326545 in words is "one trillion, six hundred forty-one billion, three hundred thirty million, three hundred twenty-six thousand, five hundred forty-five".