61439713733 has 2 divisors, whose sum is σ = 61439713734. Its totient is φ = 61439713732.

The previous prime is 61439713729. The next prime is 61439713739. The reversal of 61439713733 is 33731793416.

61439713733 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 can be written as a sum of positive squares in only one way, i.e., 32370486724 + 29069227009 = 179918^2 + 170497^2 .

It is a cyclic number.

It is not a de Polignac number, because 61439713733 - 2² = 61439713729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61439713739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30719856866 + 30719856867.

It is an arithmetic number, because the mean of its divisors is an integer number (30719856867).

Almost surely, 2^61439713733 is an apocalyptic number.

It is an amenable number.

61439713733 is a deficient number, since it is larger than the sum of its proper divisors (1).

61439713733 is an equidigital number, since it uses as much as digits as its factorization.

61439713733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 47.

The spelling of 61439713733 in words is "sixty-one billion, four hundred thirty-nine million, seven hundred thirteen thousand, seven hundred thirty-three".