61310531043 has 8 divisors (see below), whose sum is σ = 90830416400. Its totient is φ = 40873687344.

The previous prime is 61310531041. The next prime is 61310531063. The reversal of 61310531043 is 34013501316.

61310531043 is a `hidden beast` number, since 61 + 31 + 0 + 531 + 0 + 43 = 666.

It is not a de Polignac number, because 61310531043 - 2¹ = 61310531041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2270760409 = 61310531043 / (6 + 1 + 3 + 1 + 0 + 5 + 3 + 1 + 0 + 4 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61310530998 and 61310531016.

It is not an unprimeable number, because it can be changed into a prime (61310531041) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1135380178 + ... + 1135380231.

It is an arithmetic number, because the mean of its divisors is an integer number (11353802050).

Almost surely, 2^61310531043 is an apocalyptic number.

61310531043 is a deficient number, since it is larger than the sum of its proper divisors (29519885357).

61310531043 is a wasteful number, since it uses less digits than its factorization.

61310531043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270760418 (or 2270760412 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The spelling of 61310531043 in words is "sixty-one billion, three hundred ten million, five hundred thirty-one thousand, forty-three".