61385186713 has 2 divisors, whose sum is σ = 61385186714. Its totient is φ = 61385186712.

The previous prime is 61385186701. The next prime is 61385186789. The reversal of 61385186713 is 31768158316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59752380249 + 1632806464 = 244443^2 + 40408^2 .

It is a cyclic number.

It is not a de Polignac number, because 61385186713 - 2²¹ = 61383089561 is a prime.

It is a super-2 number, since 2×61385186713² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61385186113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30692593356 + 30692593357.

It is an arithmetic number, because the mean of its divisors is an integer number (30692593357).

Almost surely, 2^61385186713 is an apocalyptic number.

It is an amenable number.

61385186713 is a deficient number, since it is larger than the sum of its proper divisors (1).

61385186713 is an equidigital number, since it uses as much as digits as its factorization.

61385186713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 49.

The spelling of 61385186713 in words is "sixty-one billion, three hundred eighty-five million, one hundred eighty-six thousand, seven hundred thirteen".