1650661100001 has 12 divisors (see below), whose sum is σ = 2384729942400. Its totient is φ = 1100236877880.

The previous prime is 1650661099939. The next prime is 1650661100051. The reversal of 1650661100001 is 1000011660561.

1650661100001 is a `hidden beast` number, since 1 + 650 + 6 + 6 + 1 + 1 + 0 + 0 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 1650661100001 - 2¹³ = 1650661091809 is a prime.

It is a super-2 number, since 2×1650661100001² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1650661100051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16936665 + ... + 17033846.

It is an arithmetic number, because the mean of its divisors is an integer number (198727495200).

Almost surely, 2^{1650661100001} is an apocalyptic number.

It is an amenable number.

1650661100001 is a deficient number, since it is larger than the sum of its proper divisors (734068842399).

1650661100001 is a wasteful number, since it uses less digits than its factorization.

1650661100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33975916 (or 33975913 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 1650661100001 its reverse (1000011660561), we get a palindrome (2650672760562).

The spelling of 1650661100001 in words is "one trillion, six hundred fifty billion, six hundred sixty-one million, one hundred thousand, one".