10661561061045 has 16 divisors (see below), whose sum is σ = 17059291890432. Its totient is φ = 5685901168320.

The previous prime is 10661561061037. The next prime is 10661561061119. The reversal of 10661561061045 is 54016016516601.

It is not a de Polignac number, because 10661561061045 - 2³ = 10661561061037 is a prime.

It is a super-2 number, since 2×10661561061045² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10661561060988 and 10661561061006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16212541 + ... + 16857330.

It is an arithmetic number, because the mean of its divisors is an integer number (1066205743152).

Almost surely, 2^{10661561061045} is an apocalyptic number.

10661561061045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10661561061045 is a deficient number, since it is larger than the sum of its proper divisors (6397730829387).

10661561061045 is a wasteful number, since it uses less digits than its factorization.

10661561061045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33091372.

The product of its (nonzero) digits is 129600, while the sum is 42.

Adding to 10661561061045 its reverse (54016016516601), we get a palindrome (64677577577646).

The spelling of 10661561061045 in words is "ten trillion, six hundred sixty-one billion, five hundred sixty-one million, sixty-one thousand, forty-five".