1641165903611 has 32 divisors (see below), whose sum is σ = 1801953753600. Its totient is φ = 1485569839104.

The previous prime is 1641165903521. The next prime is 1641165903613. The reversal of 1641165903611 is 1163095611461.

It is not a de Polignac number, because 1641165903611 - 2²² = 1641161709307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1641165903613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181359815 + ... + 181368863.

It is an arithmetic number, because the mean of its divisors is an integer number (56311054800).

Almost surely, 2^{1641165903611} is an apocalyptic number.

1641165903611 is a deficient number, since it is larger than the sum of its proper divisors (160787849989).

1641165903611 is a wasteful number, since it uses less digits than its factorization.

1641165903611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10215.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 1641165903611 in words is "one trillion, six hundred forty-one billion, one hundred sixty-five million, nine hundred three thousand, six hundred eleven".