61031341812 has 144 divisors (see below), whose sum is σ = 171693466560. Its totient is φ = 16804343808.

The previous prime is 61031341807. The next prime is 61031341871. The reversal of 61031341812 is 21814313016.

It is a self number, because there is not a number n which added to its sum of digits gives 61031341812.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 9835903 + ... + 9842105.

It is an arithmetic number, because the mean of its divisors is an integer number (1192315740).

Almost surely, 2^61031341812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61031341812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85846733280).

61031341812 is an abundant number, since it is smaller than the sum of its proper divisors (110662124748).

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

61031341812 is a wasteful number, since it uses less digits than its factorization.

61031341812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6830 (or 6821 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

Adding to 61031341812 its reverse (21814313016), we get a palindrome (82845654828).

The spelling of 61031341812 in words is "sixty-one billion, thirty-one million, three hundred forty-one thousand, eight hundred twelve".