61031171061 has 32 divisors (see below), whose sum is σ = 105027206400. Its totient is φ = 34303227840.

The previous prime is 61031171059. The next prime is 61031171083. The reversal of 61031171061 is 16017113016.

61031171061 is a `hidden beast` number, since 610 + 31 + 1 + 7 + 10 + 6 + 1 = 666.

It is not a de Polignac number, because 61031171061 - 2¹ = 61031171059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61031171041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2635326 + ... + 2658383.

It is an arithmetic number, because the mean of its divisors is an integer number (3282100200).

Almost surely, 2^61031171061 is an apocalyptic number.

61031171061 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

61031171061 is a deficient number, since it is larger than the sum of its proper divisors (43996035339).

61031171061 is a wasteful number, since it uses less digits than its factorization.

61031171061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5293786 (or 5293780 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

Adding to 61031171061 its reverse (16017113016), we get a palindrome (77048284077).

The spelling of 61031171061 in words is "sixty-one billion, thirty-one million, one hundred seventy-one thousand, sixty-one".