1061220650565 has 16 divisors (see below), whose sum is σ = 1697984582400. Its totient is φ = 565973833152.

The previous prime is 1061220650563. The next prime is 1061220650587. The reversal of 1061220650565 is 5650560221601.

It is a happy number.

It is not a de Polignac number, because 1061220650565 - 2¹ = 1061220650563 is a prime.

It is a super-2 number, since 2×1061220650565² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061220650561) 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, 214591 + ... + 1472579.

It is an arithmetic number, because the mean of its divisors is an integer number (106124036400).

Almost surely, 2^{1061220650565} is an apocalyptic number.

1061220650565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1061220650565 is a deficient number, since it is larger than the sum of its proper divisors (636763931835).

1061220650565 is a wasteful number, since it uses less digits than its factorization.

1061220650565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314236.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 1061220650565 in words is "one trillion, sixty-one billion, two hundred twenty million, six hundred fifty thousand, five hundred sixty-five".