1656061566117 has 8 divisors (see below), whose sum is σ = 2523522386496. Its totient is φ = 946320894912.

The previous prime is 1656061566053. The next prime is 1656061566119. The reversal of 1656061566117 is 7116651606561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1656061566117 - 2⁶ = 1656061566053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1656061566117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656061566119) 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, 39430037268 + ... + 39430037309.

It is an arithmetic number, because the mean of its divisors is an integer number (315440298312).

Almost surely, 2^{1656061566117} is an apocalyptic number.

It is an amenable number.

1656061566117 is a deficient number, since it is larger than the sum of its proper divisors (867460820379).

1656061566117 is an equidigital number, since it uses as much as digits as its factorization.

1656061566117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78860074587.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 1656061566117 in words is "one trillion, six hundred fifty-six billion, sixty-one million, five hundred sixty-six thousand, one hundred seventeen".