1065511601615 has 4 divisors (see below), whose sum is σ = 1278613921944. Its totient is φ = 852409281288.

The previous prime is 1065511601603. The next prime is 1065511601633. The reversal of 1065511601615 is 5161061155601.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1065511601615 - 2⁶ = 1065511601551 is a prime.

It is a super-2 number, since 2×1065511601615² (a number of 25 digits) contains 22 as substring.

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, 106551160157 + ... + 106551160166.

It is an arithmetic number, because the mean of its divisors is an integer number (319653480486).

Almost surely, 2^{1065511601615} is an apocalyptic number.

1065511601615 is a deficient number, since it is larger than the sum of its proper divisors (213102320329).

1065511601615 is an equidigital number, since it uses as much as digits as its factorization.

1065511601615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213102320328.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 1065511601615 in words is "one trillion, sixty-five billion, five hundred eleven million, six hundred one thousand, six hundred fifteen".