1656765165655 has 4 divisors (see below), whose sum is σ = 1988118198792. Its totient is φ = 1325412132520.

The previous prime is 1656765165607. The next prime is 1656765165677. The reversal of 1656765165655 is 5565615676561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1656765165655 - 2³⁵ = 1622405427287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165676516561 + ... + 165676516570.

It is an arithmetic number, because the mean of its divisors is an integer number (497029549698).

Almost surely, 2^{1656765165655} is an apocalyptic number.

1656765165655 is a deficient number, since it is larger than the sum of its proper divisors (331353033137).

1656765165655 is an equidigital number, since it uses as much as digits as its factorization.

1656765165655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331353033136.

The product of its digits is 170100000, while the sum is 64.

The spelling of 1656765165655 in words is "one trillion, six hundred fifty-six billion, seven hundred sixty-five million, one hundred sixty-five thousand, six hundred fifty-five".