10661561061050 has 48 divisors (see below), whose sum is σ = 21674326540032. Its totient is φ = 3884287891200.

The previous prime is 10661561061037. The next prime is 10661561061119. The reversal of 10661561061050 is 5016016516601.

It is a super-2 number, since 2×10661561061050² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10661561060995 and 10661561061013.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202280312 + ... + 202333011.

It is an arithmetic number, because the mean of its divisors is an integer number (451548469584).

Almost surely, 2^{10661561061050} is an apocalyptic number.

10661561061050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10661561061050 is an abundant number, since it is smaller than the sum of its proper divisors (11012765478982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10661561061050 is a wasteful number, since it uses less digits than its factorization.

10661561061050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404613383 (or 404613378 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

Adding to 10661561061050 its reverse (5016016516601), we get a palindrome (15677577577651).

The spelling of 10661561061050 in words is "ten trillion, six hundred sixty-one billion, five hundred sixty-one million, sixty-one thousand, fifty".