61310718031 has 2 divisors, whose sum is σ = 61310718032. Its totient is φ = 61310718030.

The previous prime is 61310718019. The next prime is 61310718121. The reversal of 61310718031 is 13081701316.

61310718031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61310718031 - 2⁷ = 61310717903 is a prime.

It is a super-2 number, since 2×61310718031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61310717984 and 61310718002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61310718011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30655359015 + 30655359016.

It is an arithmetic number, because the mean of its divisors is an integer number (30655359016).

Almost surely, 2^61310718031 is an apocalyptic number.

61310718031 is a deficient number, since it is larger than the sum of its proper divisors (1).

61310718031 is an equidigital number, since it uses as much as digits as its factorization.

61310718031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The spelling of 61310718031 in words is "sixty-one billion, three hundred ten million, seven hundred eighteen thousand, thirty-one".