1101661051165 has 16 divisors (see below), whose sum is σ = 1400702874480. Its totient is φ = 828925788160.

The previous prime is 1101661051129. The next prime is 1101661051177. The reversal of 1101661051165 is 5611501661011.

It can be written as a sum of positive squares in 8 ways, for example, as 28077023844 + 1073584027321 = 167562^2 + 1036139^2 .

It is not a de Polignac number, because 1101661051165 - 2⁹ = 1101661050653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1101661051165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4249780 + ... + 4501549.

It is an arithmetic number, because the mean of its divisors is an integer number (87543929655).

Almost surely, 2^{1101661051165} is an apocalyptic number.

It is an amenable number.

1101661051165 is a deficient number, since it is larger than the sum of its proper divisors (299041823315).

1101661051165 is a wasteful number, since it uses less digits than its factorization.

1101661051165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8752832.

The product of its (nonzero) digits is 5400, while the sum is 34.

The spelling of 1101661051165 in words is "one trillion, one hundred one billion, six hundred sixty-one million, fifty-one thousand, one hundred sixty-five".