39468730781 has 2 divisors, whose sum is σ = 39468730782. Its totient is φ = 39468730780.

The previous prime is 39468730771. The next prime is 39468730831. The reversal of 39468730781 is 18703786493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36223605625 + 3245125156 = 190325^2 + 56966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39468730781 is a prime.

It is a super-2 number, since 2×39468730781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39468730771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19734365390 + 19734365391.

It is an arithmetic number, because the mean of its divisors is an integer number (19734365391).

Almost surely, 2^39468730781 is an apocalyptic number.

It is an amenable number.

39468730781 is a deficient number, since it is larger than the sum of its proper divisors (1).

39468730781 is an equidigital number, since it uses as much as digits as its factorization.

39468730781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 39468730781 in words is "thirty-nine billion, four hundred sixty-eight million, seven hundred thirty thousand, seven hundred eighty-one".