61031340712 has 16 divisors (see below), whose sum is σ = 114475432500. Its totient is φ = 30504558720.

The previous prime is 61031340709. The next prime is 61031340749. The reversal of 61031340712 is 21704313016.

It can be written as a sum of positive squares in 2 ways, for example, as 58877081316 + 2154259396 = 242646^2 + 46414^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1365589 + ... + 1409572.

Almost surely, 2^61031340712 is an apocalyptic number.

It is an amenable number.

61031340712 is a deficient number, since it is larger than the sum of its proper divisors (53444091788).

61031340712 is a wasteful number, since it uses less digits than its factorization.

61031340712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777916 (or 2777912 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 61031340712 its reverse (21704313016), we get a palindrome (82735653728).

The spelling of 61031340712 in words is "sixty-one billion, thirty-one million, three hundred forty thousand, seven hundred twelve".