1611886246561 has 8 divisors (see below), whose sum is σ = 1730741157504. Its totient is φ = 1495702232640.

The previous prime is 1611886246547. The next prime is 1611886246567. The reversal of 1611886246561 is 1656426881161.

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

It is a cyclic number.

It is not a de Polignac number, because 1611886246561 - 2³⁹ = 1062130432673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1611886246567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667723005 + ... + 667725418.

It is an arithmetic number, because the mean of its divisors is an integer number (216342644688).

Almost surely, 2^{1611886246561} is an apocalyptic number.

It is an amenable number.

1611886246561 is a deficient number, since it is larger than the sum of its proper divisors (118854910943).

1611886246561 is a wasteful number, since it uses less digits than its factorization.

1611886246561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335448511.

The product of its digits is 3317760, while the sum is 55.

The spelling of 1611886246561 in words is "one trillion, six hundred eleven billion, eight hundred eighty-six million, two hundred forty-six thousand, five hundred sixty-one".