61010005605561 has 64 divisors (see below), whose sum is σ = 92391321600000. Its totient is φ = 39775805334720.

The previous prime is 61010005605557. The next prime is 61010005605589. The reversal of 61010005605561 is 16550650001016.

It is not a de Polignac number, because 61010005605561 - 2² = 61010005605557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61010005605161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 540817240 + ... + 540930038.

It is an arithmetic number, because the mean of its divisors is an integer number (1443614400000).

Almost surely, 2^{61010005605561} is an apocalyptic number.

It is an amenable number.

61010005605561 is a deficient number, since it is larger than the sum of its proper divisors (31381315994439).

61010005605561 is a wasteful number, since it uses less digits than its factorization.

61010005605561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114091 (or 114085 counting only the distinct ones).

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

Adding to 61010005605561 its reverse (16550650001016), we get a palindrome (77560655606577).

The spelling of 61010005605561 in words is "sixty-one trillion, ten billion, five million, six hundred five thousand, five hundred sixty-one".