1065601505561 has 8 divisors (see below), whose sum is σ = 1081608745824. Its totient is φ = 1049597287200.

The previous prime is 1065601505533. The next prime is 1065601505621. The reversal of 1065601505561 is 1655051065601.

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 1065601505561 - 2¹⁸ = 1065601243417 is a prime.

It is a super-2 number, since 2×1065601505561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1065601505861) 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, 39875 + ... + 1460408.

It is an arithmetic number, because the mean of its divisors is an integer number (135201093228).

Almost surely, 2^{1065601505561} is an apocalyptic number.

It is an amenable number.

1065601505561 is a deficient number, since it is larger than the sum of its proper divisors (16007240263).

1065601505561 is a wasteful number, since it uses less digits than its factorization.

1065601505561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510951.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 1065601505561 in words is "one trillion, sixty-five billion, six hundred one million, five hundred five thousand, five hundred sixty-one".