76631069729 has 2 divisors, whose sum is σ = 76631069730. Its totient is φ = 76631069728.

The previous prime is 76631069719. The next prime is 76631069747. The reversal of 76631069729 is 92796013667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70998267025 + 5632802704 = 266455^2 + 75052^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76631069729 is a prime.

It is not a weakly prime, because it can be changed into another prime (76631069719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38315534864 + 38315534865.

It is an arithmetic number, because the mean of its divisors is an integer number (38315534865).

Almost surely, 2^76631069729 is an apocalyptic number.

It is an amenable number.

76631069729 is a deficient number, since it is larger than the sum of its proper divisors (1).

76631069729 is an equidigital number, since it uses as much as digits as its factorization.

76631069729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5143824, while the sum is 56.

The spelling of 76631069729 in words is "seventy-six billion, six hundred thirty-one million, sixty-nine thousand, seven hundred twenty-nine".