78729792767 has 2 divisors, whose sum is σ = 78729792768. Its totient is φ = 78729792766.

The previous prime is 78729792761. The next prime is 78729792797. The reversal of 78729792767 is 76729792787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78729792767 - 2⁴ = 78729792751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78729792767.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78729792761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39364896383 + 39364896384.

It is an arithmetic number, because the mean of its divisors is an integer number (39364896384).

Almost surely, 2^78729792767 is an apocalyptic number.

78729792767 is a deficient number, since it is larger than the sum of its proper divisors (1).

78729792767 is an equidigital number, since it uses as much as digits as its factorization.

78729792767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 261382464, while the sum is 71.

The spelling of 78729792767 in words is "seventy-eight billion, seven hundred twenty-nine million, seven hundred ninety-two thousand, seven hundred sixty-seven".