1656161161610 has 16 divisors (see below), whose sum is σ = 2981105581896. Its totient is φ = 662461022208.

The previous prime is 1656161161609. The next prime is 1656161161619. The reversal of 1656161161610 is 161611616561.

It can be written as a sum of positive squares in 4 ways, for example, as 1604622627169 + 51538534441 = 1266737^2 + 227021^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1656161161619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2619914 + ... + 3190026.

Almost surely, 2^{1656161161610} is an apocalyptic number.

1656161161610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1656161161610 is a deficient number, since it is larger than the sum of its proper divisors (1324944420286).

1656161161610 is a wasteful number, since it uses less digits than its factorization.

1656161161610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860617.

The product of its (nonzero) digits is 38880, while the sum is 41.

The spelling of 1656161161610 in words is "one trillion, six hundred fifty-six billion, one hundred sixty-one million, one hundred sixty-one thousand, six hundred ten".