1656105605061 has 4 divisors (see below), whose sum is σ = 2208140806752. Its totient is φ = 1104070403372.

The previous prime is 1656105605059. The next prime is 1656105605069. The reversal of 1656105605061 is 1605065016561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1656105605061 - 2¹ = 1656105605059 is a prime.

It is a super-3 number, since 3×1656105605061³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656105605069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276017600841 + ... + 276017600846.

It is an arithmetic number, because the mean of its divisors is an integer number (552035201688).

Almost surely, 2^{1656105605061} is an apocalyptic number.

It is an amenable number.

1656105605061 is a deficient number, since it is larger than the sum of its proper divisors (552035201691).

1656105605061 is an equidigital number, since it uses as much as digits as its factorization.

1656105605061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552035201690.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 1656105605061 in words is "one trillion, six hundred fifty-six billion, one hundred five million, six hundred five thousand, sixty-one".