1611712161655 has 16 divisors (see below), whose sum is σ = 1955577426624. Its totient is φ = 1275052204800.

The previous prime is 1611712161649. The next prime is 1611712161659. The reversal of 1611712161655 is 5561612171161.

It is not a de Polignac number, because 1611712161655 - 2⁵ = 1611712161623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611712161659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1523334 + ... + 2354563.

It is an arithmetic number, because the mean of its divisors is an integer number (122223589164).

Almost surely, 2^{1611712161655} is an apocalyptic number.

1611712161655 is a deficient number, since it is larger than the sum of its proper divisors (343865264969).

1611712161655 is a wasteful number, since it uses less digits than its factorization.

1611712161655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878826.

The product of its digits is 75600, while the sum is 43.

The spelling of 1611712161655 in words is "one trillion, six hundred eleven billion, seven hundred twelve million, one hundred sixty-one thousand, six hundred fifty-five".