1065506100561 has 12 divisors (see below), whose sum is σ = 1758930705792. Its totient is φ = 608860628856.

The previous prime is 1065506100559. The next prime is 1065506100629. The reversal of 1065506100561 is 1650016055601.

It is not a de Polignac number, because 1065506100561 - 2¹ = 1065506100559 is a prime.

It is a super-2 number, since 2×1065506100561² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1065506100961) 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 11 ways as a sum of consecutive naturals, for example, 8456397561 + ... + 8456397686.

It is an arithmetic number, because the mean of its divisors is an integer number (146577558816).

Almost surely, 2^{1065506100561} is an apocalyptic number.

It is an amenable number.

1065506100561 is a deficient number, since it is larger than the sum of its proper divisors (693424605231).

1065506100561 is a wasteful number, since it uses less digits than its factorization.

1065506100561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16912795260 (or 16912795257 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 1065506100561 in words is "one trillion, sixty-five billion, five hundred six million, one hundred thousand, five hundred sixty-one".