1068165221761 has 16 divisors (see below), whose sum is σ = 1206939585600. Its totient is φ = 936418190400.

The previous prime is 1068165221759. The next prime is 1068165221789. The reversal of 1068165221761 is 1671225618601.

It is not a de Polignac number, because 1068165221761 - 2¹ = 1068165221759 is a prime.

It is a super-2 number, since 2×1068165221761² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1068165221161) 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, 1805706 + ... + 2323123.

It is an arithmetic number, because the mean of its divisors is an integer number (75433724100).

Almost surely, 2^{1068165221761} is an apocalyptic number.

1068165221761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1068165221761 is a deficient number, since it is larger than the sum of its proper divisors (138774363839).

1068165221761 is a wasteful number, since it uses less digits than its factorization.

1068165221761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129680.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 1068165221761 in words is "one trillion, sixty-eight billion, one hundred sixty-five million, two hundred twenty-one thousand, seven hundred sixty-one".