1611060665551 has 8 divisors (see below), whose sum is σ = 1617985606320. Its totient is φ = 1604140812288.

The previous prime is 1611060665521. The next prime is 1611060665569. The reversal of 1611060665551 is 1555660601161.

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 1611060665551 - 2³⁵ = 1576700927183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1611060665498 and 1611060665507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611060665521) 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, 636496 + ... + 1904533.

It is an arithmetic number, because the mean of its divisors is an integer number (202248200790).

Almost surely, 2^{1611060665551} is an apocalyptic number.

1611060665551 is a deficient number, since it is larger than the sum of its proper divisors (6924940769).

1611060665551 is a wasteful number, since it uses less digits than its factorization.

1611060665551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543753.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 1611060665551 in words is "one trillion, six hundred eleven billion, sixty million, six hundred sixty-five thousand, five hundred fifty-one".